Inﬂuence of Attachment Theory on Pro-Environmental Behavior and Well-Being: A Case of Organic Agricultural Tourism in Taiwan Hualien and Taitung

: Organic agricultural tourism is an environment-friendly tourism that has emerged in recent years. However, no comprehensive dependency theory discusses the tourists’ pro-environmental behavior and well-being from the perspective of the public sphere. This research aims to verify the effect of the four dimensions of attachment and its impact on pro-environmental behavior. This research substantiated that the four aspects of attachment theory had a positive and signiﬁcant inﬂuence on pro-environmental behavior and well-being. Furthermore, place and activity attachment had the highest impact. The results serve as a basis for understanding and motivating tourists’ pro-environmental behaviors and assist them in achieving well-being through organic agriculture tourism. This research also suggests sustainable development practices for destination operators or managers.


Introduction
The "2030 Sustainable Development Goals (SDGs)" emphasize that climate and environmental changes significantly affect the earth, which is one of humankind's most critical challenges that needs attention [1,2].Tourism is highly dependent on the environmental and climatic conditions of the destination.The ecological degradation caused by tourism has also led to the decline of many tourism destinations [3,4].The tourism industry and environmental issues are complementary to each other.
Organic agricultural tourism is an eco-friendly and sustainable form of tourism developed in recent years.Through it, visitors can learn more about agricultural areas, products, food, cultural elements, and the local traditional communities [5,6].To meet the challenges of rural development and the market demand of tourists for rural areas, developing rural alternative goods and services to increase economic benefits, such as organic agriculture, natural agriculture, environmental protection, and tourism, is necessary [7].Compared with general tourism activities, it is essential to promote the landscape resources of organic agricultural tourism [8].In addition, agricultural tourism can increase income through products and activities, thus bringing additional cash flow and profitability to agriculture [9][10][11].Therefore, agricultural tourism is an effective measure of rural development and a source of tourism income [12][13][14].Traditional agriculture is no longer the main or only economic driver of rural development, and tourism has been recognized as an effective catalyst for the rural environment and economic revitalization [7,15].
Taiwan began to promote organic agriculture and organic farming in 1996.The total area of organic farmland increased from 159.6 hectares in 1996 to 11,765 hectares in 2022 [16].The combination of organic agriculture and rural tourism has led to the dynamic development of organic agricultural tourism, which has become a good place for urban dwellers to take vacations and connect with the environment.For residents of modern cities, ecotourism is not only a tribute to fashion but also a natural choice for leisure [15].However, organic agriculture is less common than mass tourism [15].Ibáñez-Rueda et al. [17] pointed out that pro-environmental behavior is an intermediary variable between natural connection and well-being; there is currently no research on pro-environmental behavior in organic agricultural tourism.Therefore, this research takes the Hualien and Taitung areas in Taiwan as examples to explore tourists' pro-environmental behavior in organic agricultural tourism.
Based on tourists' environmentally responsible behavior, effective ways to promote the sustainable development of destinations have become a common focus topic in current tourism practices and academia [18][19][20].The change in individual consumption behavior (such as environment-friendly behavior, purchase, and the consumption of products) is an essential prerequisite for the sustainable development of environmental regions [21,22].In particular, tourism is a multi-dimensional industry that interacts with the environment.The environmental knowledge gained by tourists from their travel experience can positively affect and shape people's attitudes and behaviors toward sustainable environmental development [23].If tourists' consumption behavior is irresponsible or unfriendly to the environment, they are essential triggers that harm the environment [19].Weaver and Lawton [24] believed in the symbiotic relationship between responsible tourists' behavior and the sustainability of the destination.Thus, tourists' pro-environmental behavior could be regarded as an advocacy for environmental protection.As Steg and Vlek [25] mentioned, tourists' consumption behavior affects the climate and environment because tourists' behavior is the primary source of environmental problems.In addition, highquality environmental and climatic conditions can also bring people a more comfortable living environment [26].When tourists think that the behavior beneficial to the environment or nature is meaningful [27], they receive satisfaction from this behavior and good feelings, thus positively affecting their subjective well-being [28].From a moral point of view, well-being should not be obtained through selfish behavior.If consumption activities can promote the protection of the natural environment, it may affect their well-being [29].In other words, environment-friendly behaviors will increase the well-being of tourists by improving the environmental conditions of people's lives [30].Therefore, one of the objectives of this research is to find out how pro-environmental behavior during organic agricultural tourism affects the well-being of tourists.
Attachment theory is widely used in leisure tourism-related research, and it denotes a particular emotion people have toward things, which makes people like, rely on, and identify with things [31].Previous studies have found that place attachment relates to environmental protection behavior for two reasons: 1. Emotional bonds make tourists feel empathy and sympathy for the destination.2. During the performance process, tourists witness the degradation of the environment caused by tourism.Between these two points, tourists have the desire (attitude, behavior) to voluntarily protect these destinations [32].However, the research on attachment theory related to pro-environment behavior usually stops at a place or emotional attachment [33][34][35].Hou et al. [36] conceptualized destination attachment as a relationship structure composed of tourists' cognition and emotional connection to destination development.The object of attachment can be based on a place's social or physical elements [37]; it is not limited to place attachment.Under the influence of the epidemic, tourism demand has shifted to more meaningful tourism activities [38,39].Tourists can deeply understand the environmental resources, values, and environmental protection behaviors through tourism activities [40].Thus, environmental attachment is inseparable from protecting the environment [40,41].Organic agricultural products can enhance tourists' awareness of the importance of environmental resources [42] and bring inner well-being [43] through product attachment.According to the above analysis, the attachment theory includes the following four types in this research: place attachment, activity product attachment, environmental attachment, and product attachment.
Most studies have focused on the discussion of place attachment [44][45][46][47].However, only a few have established a comprehensive attachment framework.The effects of attachment theory on pro-environmental behaviors from different antecedent variables also still need to be explored.Therefore, this research aims to establish a comprehensive theoretical framework of attachment and explore which attachment has the most significant effect on pro-environmental behavior.This is to reduce the academic gap on related theories.In addition, the results can make destination managers and operators more aware of tourists' pro-environmental behavior.This will promote organic agriculture tourism's sustainable development and maximize tourists' well-being.Based on the above discussion, the research objectives are as follows: 1.
To determine the effect of place attachment, product attachment, environmental attachment, and activity attachment of organic agriculture on tourists' pro-environment behavior.2.
To investigate the effect of pro-environment behaviors of organic agriculture on tourists' well-being.

The Relationship between Attachment and Pro-Environmental Behavior
Place attachment is an essential indicator of environmental management [48] and protection behavior [37,[49][50][51].It is the cognitive and emotional bond between people and places [47,48] and can predict people's behavior toward the environment [32,52].This attachment stems from people's interaction with a place and society [47].Therefore, place attachment in this research refers to the emotional bond generated by tourists' interaction and cognition with the locals in organic agricultural tourism.
Dang and Maurer [53] showed that the higher the place attachment is, the higher the pro-environmental behavior.This emotional bond helps to understand the attitude and behavior of tourists after traveling to a specific place and the residents' response to environmental changes.Park et al. [54] believed that tourism groups often establish solid emotional ties with scenic spots to meet their internal needs to have a positive attitude and behavior toward a destination/place.Increasing the chance of contact with nature will enhance the individual's attachment to the place and improve pro-environmental behavior [55,56].The higher degree of place attachment, the more inclined to maintain the existing environmental attitude, and the higher the individual's intention for environmental protection [57,58].Environmental psychologists use place attachment to predict and evaluate pro-environment behavior [47,49,50,59].This is because individuals are willing to protect places that are meaningful to them [60].This research posits that tourists' attachment to a place can lead to a sense of responsibility for the local environment.Therefore, the following hypothesis was proposed: H 1a : Place attachment has a significant positive impact on pro-environmental behavior.
According to the regulations on the management of organic agricultural products in Chapter IV of the Organic Agriculture Promotion Law published by the Council of Agriculture, Executive Yuan in 2018 only agricultural products approved by a qualified "verification agency" from the initial production to subsequent processing, packaging, and circulation processes comply with government regulations can be labeled as Taiwancertified organic agricultural products.Attachment is a particular emotion that makes people like, rely on, and identify with things [18].Thus, this research defines product attachment as the emotional bond between tourists and organic agricultural products.
Customers feel attached to a particular product and commit to continue buying the product [61] such as the purchase of products with environmental labels, eating organic fruits, and interest in recycling activities [62].When people feel connected to a green product, they may continue to purchase and consume it [63].Organic agricultural products can meet the needs of the public to pay attention to food safety and pursue health and wellness, thus making tourists identify and rely on organic agricultural products [31].In addition, when consumers gain environmental knowledge and understand which products or production processes pollute the environment, they are more likely to develop positive environmental attitudes and buy environmentally friendly products [42].Therefore, this study put forward the hypothesis: H 1b : Product attachment has a significant positive impact on pro-environmental behavior.
Creating meaningful spaces for tourists and increasing tourists' participation in local environmental activities forms an environmental attachment [64].One of its essential functions is to make people understand the primary value of the natural world.When people appreciate the environment, it shows environmental awareness and inspiration for exploration, gratitude, compassion, and guilt [3].Tourists' environmental attachment to natural places contributes to their emotional and psychological recovery [49].Therefore, this research defines environment attachment as the emotional connection to the environment generated by tourists in an organic agricultural atmosphere.
Contact with nature can encourage the behavior of protecting the environment [65,66].These behaviors help reduce the harm tourists bring to the environment [67].Travelers' environmental attitudes strongly affect their willingness to participate in environmental tourism [68].Meanwhile, environmental awareness encourages them to show environmentally responsible behavior, and improving environmental awareness will positively affect tourists' pro-environmental behavior [69].Ahmad et al. [3] showed that environmental awareness, attention, and attachment positively and significantly affect tourists' pro-environmental behavior.The more individuals participate in activities involving the natural environment, the more they pay attention to environmental protection.This connection with nature leads to a higher level of well-being [70].Thus, this research proposes the following hypothesis: H 1c : Environmental attachment has a significant positive impact on pro-environmental behavior.
An activity site in a specific space and environment that provides services to people.The activity location and explicit content constitute the activity place and behavior [71].The motivation of the activity might be the environmental awareness and behavior generated by taking biology or place as the center [72].Therefore, activity attachment is defined as the protection awareness of the biological or agricultural environment generated by tourists in the interactive activities of the organic agricultural environment.
Exposure to nature, natural leisure, and outdoor activities affects pro-environmental behavior; the more tourists appreciate the natural environment and spend more time on natural leisure activities, the more it encourages pro-environmental behavior [73].Therefore, the more people understand and participate in environmental issues, the more they can encourage people to engage in pro-environment actions [74].Accordingly, this research proposed the hypothesis is: H 1d : Activity attachment has a significant positive impact on pro-environmental behavior.

The Relationship between Pro-Environmental Behavior and Well-Being
Environmental behavior is considered beneficial to improve the environmental quality of a destination and promote the sustainable development of the natural environment and cultural resources [75].Pro-environmental behavior is similar to pro-social behavior toward others [76], positively affecting individual well-being [77].Pro-environmental behaviors are divided into the public sphere (individuals voluntarily participating in environmental protection or actively solving environmental problems) and the private sphere (individuals' environmental behaviors closely related to daily life for their interests).However, previous studies have discussed environmental protection and well-being from the perspective of the private sphere [78][79][80].Pro-environmental behavior is a broad range of environmentally conscious behaviors that individuals voluntarily undertake to reduce and minimize environmental damage by tourists [81].From the perspective of the public sphere, this research explores which aspects of tourists' attachments affect pro-environmental behaviors and the effect of pro-environmental behaviors on well-being.Therefore, pro-environmental behavior is defined in this research as the behavior of tourists who voluntarily participate in the protection of organic agriculture, actively solve environmental problems, and are willing to purchase and use organic agricultural products.
Well-being is a person's self-evaluation of whether they are living a better life.It is a person's subjective evaluation of life's emotions, satisfaction, and cognition.Meseroll [82] emphasized that well-being should be based on morality, not selfishness.Therefore, if consumption activities can promote the protection of the natural environment, it will affect their well-being [29,83].Based on the above, this study defines well-being as the better life experience and inner satisfaction tourists experience by engaging in pro-environmental behaviors toward organic agriculture.
Experiencing a sustainable way of life is pleasant in itself, and pro-environmental behaviors will increase well-being by improving the environmental conditions in which people live [30].Deterioration of the local environment can lead to a feeling of a loss of a part of oneself and a threat to one's well-being [84,85].Davis et al. [86] pointed out that people's well-being from the natural environment will strengthen their participation in environmental protection behavior.People's involvement in maintaining the place's quality will help improve the quality of life and well-being [57,87].The above discussion shows that tourists' pro-environmental behavior can give them a feeling of well-being.Therefore, this research puts forward the last hypothesis: H 2 : Pro-environmental behavior has a significant positive impact on well-being.

Research Site
The site of this study was Huatung, Taiwan.The area is landlocked by mountains with fertile soil and clean air, ideal for organic agricultural cultivation.It produces highquality agricultural products, which are then supplied to the market.Organic agriculture reduces the impact of agricultural production on environmental pollution and promotes the sustainable operation of ecologically diversified agriculture.In addition, it helps conserve Taiwan's water and soil resources and biodiversity sustainability, as well as maintain food safety and public health [88].The area of organic agriculture in the Huatung area was as high as 5219 hectares as of August 110, accounting for 31% of the total area of organic agriculture in Taiwan [16].

Measurement Development
This research utilized the survey method as the primary data collection tool.The survey questionnaire included four parts: attachment, pro-environmental behavior, wellbeing, and demographic variables.First, attachment is the recognition and dependence of tourists on places, products, environments, and activities related to tourism destinations.It is based on four dimensions: place attachment (PLA), product attachment (PDA), environment attachment (EVA), and activity attachment (ACA).Second, well-being (WB) is a kind of satisfaction, positive emotion, and self-realization of life needs.It is measured by subjective well-being and positive feeling, including satisfaction with well-being needs, self-realization, life satisfaction, pleasure, physical and mental health, interpersonal relationships, and living environment satisfaction.Third, pro-environmental behavior (PEB) is tourists loving the environment.Tourists actively participating in organic agriculture tourism activities, are willing to share ideas and practices of organic agriculture environmental protection, and play a more active role in environmental protection.
The respondents include those who like organic tourism and product experience activities, prefer to buy organic agricultural products, want to participate in the rural life experience of organic agricultural tourism, and are willing to share organic agricultural and environmental protection ideas with others.A seven-point Likert scale, ranging from 1 = extremely disagree to 7 = extremely agree, was used to measure the tourists' perception.
Fourth, the demographic variables included gender, marriage, age, education, occupation, residence, and income.

Data Collection
This research used convenience sampling method to select the respondents.The respondents were tourists who visited the organic agritourism areas in Taiwan's Huatung areas.The questionnaire was created through the SurveyCake platform and distributed to respondents of different social groups with other functions and ages.Questionnaires were also distributed to the tourism community in Huatung using Facebook and Line.Each link could only be answered once by the participants.Since respondents may have different work and rest habits, the questionnaires were distributed at different times.
Because of the COVID-19 pandemic, the researchers could not collect face-to-face data.To overcome this barrier, the online questionnaire was more rigorous and standardized.Before filling out the questionnaire, the respondents were screened using two criteria: 1.The respondent must be 20 years old.2. They must have visited the research site within the last 2 years.In total, 479 questionnaires were distributed from 1 January 2021 to 30 August 2021, and 438 valid questionnaires were received.

Analysis Tool
This research utilized SPSS 21.0 to understand the basic situation of tourists through descriptive statistics.The Linear Structure Relationship Model (LISREL) was used to verify the constructed linear structure model and the impact relationship between the variables.

Demographic Statistics
The demographic characteristics of respondents showed that there were more male participants (51.8%) than females (48.2%).Most participants were between 32 and 41 years of age (47.0%), followed by 42-51 years of age (35.2%).There were also more married participants (59.1%) than unmarried (37.4%).Most participants had a university degree (68.5%), followed by high school (14.6%).The average monthly income of the participants was above TWD 65,000 (USD 2311) at 27.4%, followed by TWD 25,000-35,000 (USD 888-1243) at 24.4%.Most participants worked in the service industry (28.8%), followed by the business industry (20.1%).In terms of their place of residence, the majority lived in the southern region (79.2%),followed by those living in the northern region (13.2%).Table 1 shows the detailed demographic profiles of the participants.

Descriptive Statistics
The results of the descriptive analysis are shown in Appendix A. The average place attachment ranged from 4.85 to 5.58, with "I agree with the development of organic agricultural tourism" having the highest mean score.The average product attachment ranged from 4.95 to 5.45, with "Compared with other agricultural products, organic agricultural products attract me more" having the highest mean score.The average environment attachment ranged from 5.39 to 5.68, with "The experience of organic agricultural tourism makes me better understand the significance of environmental protection" having the highest mean score.The activity attachment ranged from 5.23 to 5.57, with "Organic agriculture tourism experience activities bring me good memories" having the highest mean score.The well-being ranged from 5.45 to 5.67, with "I am interested in daily activities" having the highest mean score.The pro-environmental behavior ranged from 5.26 to 5.55, with "I am willing to protect the organic agricultural environment more actively" having the highest mean score.

Structural Model
In this research, the independent variables were place attachment (PLA), product attachment (PDA), environmental attachment (EVA), and activity attachment (ACA); the dependent variables were pro-environmental behavior (PEB) and well-being (WB).LIS-REL verified the constructed linear structure model and the impact relations between the variables of the proposed research hypotheses.Figure 1 shows the path coefficient of the structural model.The error variation was positive for the primary goodness-of-fit index of this research model.The coefficient ranged from 0.71 to 0.98, and Cronbach's α ranged from 0.910 to 0.948.The composite reliability (CR) ranged from 0.890 to 0.959, which surpasses the recommended 0.7 [89].Meanwhile, the average variance extracted (AVE) ranged from 0.669 to 0.886 (exceeding 0.5), indicating good convergent validity.These results showed that the reliability and validity of each dimension were acceptable (Table 2).The error variation was positive for the primary goodness-of-fit index of this research model.The coefficient ranged from 0.71 to 0.98, and Cronbach's α ranged from 0.910 to 0.948.The composite reliability (CR) ranged from 0.890 to 0.959, which surpasses the recommended 0.7 [89].Meanwhile, the average variance extracted (AVE) ranged from 0.669 to 0.886 (exceeding 0.5), indicating good convergent validity.These results showed that the reliability and validity of each dimension were acceptable (Table 2).Concerning the goodness-of-fit index of the model, the chi-square statistic (χ2) was 744.32 (df = 300), while the chi-square ratio (χ2/df) was 2.48.The goodness-of-fit index (GFI) was 0.82, and the adjusted goodness-of-fit index (AGFI) was 0.76.The root means a square error of approximation (RMSEA) was 0.077, the mean square residual (RMR) was 0.055, the normalized fit index (NFI) was 0.97, the non-normalized fit index (NNFI) was 0.98, and the comparative fit index (CFI) was 0.98.All indices mentioned above were within an acceptable range, which indicates that the overall goodness-of-fit of the model was good [90] and shows that the model fitted well with the data.
Table 3 shows the square root values of AVE most were greater than the normalized correlation coefficients among the variables, which means that the scale had high discriminant validity.Based on the analysis, the verification of the research hypothesis is presented in Table 4.The hypotheses were all accepted (p < 0.050).

Discussion
This research verified the theoretical framework of attachment theory in different aspects of pro-environmental behavior and pro-environmental behavior on well-being.Table 2 reveals the path coefficients of each item in its dimension.The critical factors of PLA were PLA4 (0.91) and PLA1 (0.89), which represent the emotional bond generated by tourists' interaction and cognition with the village atmosphere of organic agriculture.The critical factors of PDA were PDA3 (0.95) and PDA1 (0.94), which shows that tourists like, rely on, and identify with organic agricultural products and thus have an emotional connection with them.Meanwhile, the critical factor of EVA was EVA2 (0.98), which means that tourists have a better understanding of the meaning of environmental protection through the experience of organic agricultural tourism, thereby generating awareness of the protection and reflection of the local environment.The critical factors of ACA were ACA4 (0.96), ACA2 (0.95), and ACA5 (0.95), which shows that the attractiveness of organic farming environmental activities and bringing good memories to tourists can increase the interaction between tourists and the environment, thereby deepening the intimacy of tourists' experience.Finally, the critical factors of PEB were EB3 (0.90) and PEB1 (0.87), which reveals that visitors voluntarily participate in the conservation of organic agriculture, address environmental concerns, and are actively involved in the environmental protection experience.The above path analysis explains the main influencing factors of tourists' proenvironmental and life satisfaction and well-being.These results also reveal how tourists affect pro-environmental behavior and well-being through their experience of attachment to organic agriculture.
According to the path coefficients of the structural model (Figure 1), this research finds that PLA (0.38) and ACA (0.36) are the principal structural paths that affect the environment.The tourists' feelings and emotional connection to the organic agricultural environment are the main factors that influence whether they are willing to participate in environmental protection activities.The local activity experience is the source of feeling the importance and value of the environment.PDA (0.22) also has an important impact on environment-friendly behaviors.Certified organic agricultural products are also emotional bonds between tourists and environment-friendly behaviors.EVA (0.16) is an influential factor that must be addressed.When appreciating the environment, understanding of the fundamental values of the environment can also trigger the tourists' environmental awareness of exploration, gratitude, sympathy, and guilt.Finally, tourists voluntarily solve and participate in the protection of organic agriculture and are willing to purchase and use organic agricultural products for interaction and emotional connection.These activities provide a better life experience and produces a sense of satisfaction.

Theoretical Implications
This research enhances the attachment theory with four different factors and determines which factors affect tourists' pro-environmental behaviors.It also explains the enhanced well-being of tourists traveling to organic agritourism from a public perspective.The study not only complements the application of attachment theory in tourism but also explains the impact of organic agriculture on tourists' pro-environmental behavior from a public perspective and well-being.
Moreover, the result demonstrates that place attachment, product attachment, environmental attachment, and activity attachment significantly and positively affect pro-environmental behavior.Drivers from different perspectives were put into the pro-environmental behavior and well-being to build a comprehensive attachment theory and verify that this theoretical framework is established.Through analysis, this research confirms the model to be stable.As such, this study introduces a new theoretical framework for future researchers and augments the literature and theoretical basis for organic agricultural tourism.This is a breakthrough in the academic field.

Industrial Implications
Place attachment is the main factor affecting pro-environmental behavior, and this is similar to previous findings [33,34,37].Among them, the more profound emotion for organic agriculture accounts for the most significant proportion [32].That is, it should not only stay in the landscape setting and improvement of infrastructure but should attract tourists from the emotional side, such as nostalgic experience and design.Nostalgia becomes an emotional experience that allows people to relive or recall deep memories from the past [91].It is important to attract tourists with an appealing activity design, endow environmental protection with educational significance, and guide or publicize the concept of paying attention to the environment.
Individuals with deep environmental concerns are more likely to show pro-environmental behavior.Consequently, the ecological situation is necessary for pro-environmental conduct [3].Organic agricultural products should combine "production, life, and ecology;" let customers understand the complete ecological chain; strengthen tourists' understanding of the relationship between products and the environment; and increase the dependence of products on pro-environmental behavior [42].Therefore, that the link between products and the environment should be emphasized when guiding scenic spots.
"Organic tourism experience activities" also play the most critical role in increasing tourists' pro-environmental behaviors [64].This research suggests that the organic agricultural environment should not only cover planting and agriculture but also involve ecological and biological breeding.Diverse animal and plant experiences and interactive activities allow tourists to connect with the environment and protect themselves [72].For example, tourists may adopt some plants and animals and learn to care for them.Another way is to design an activity competition where the winner can adopt and take care of animals or plants.These activities remind tourists to be pro-environment by making substantive items through activities that tourists can take back as memories and remembrances [73,74]; for example, tourists can use environmentally friendly materials to make DIY products, which can be brought back as souvenirs.
The impact of environmental and product attachment on the pro-environment is also not to be underestimated.Suppose tourists have the opportunity to participate in the cultivation of organic agriculture, with explanations of agricultural products.In that case, they will better understand the value of organic agriculture on the environment and the concept of this production and cultivation mode [3].Similarly, organic agricultural products can be displayed and explained, or tourists can participate in production, processing, and repackaging [92].These activities will increase tourists' liking, cognition, and dependence on organic agricultural products.

Limitations and Future Research
First, although this research integrates the four attachment theories of place, products, environment, and activities and verifies their impact on pro-environmental behavior and well-being, it ignores the effect of cultural attachment on tourist behavior.This research suggests that future studies can explore the impact of pro-environmental behavior on sustainable development from the perspective of cultural connotation.Second, this study had fewer participants since only tourists who have visited organic agricultural tourism in the Huatung areas were eligible to participate.In contrast, in the case of mass tourism, there can be many participants.Future research can explore mass tourism according to the framework developed by this study.Third, the primary purpose of this research was to verify the effect of the four variables.However, the study did not explore whether there are differences between ages or gender.Thus, it is suggested that future researchers can make a differential analysis of the demographic variables among different ethnic participants.Finally, this study focused on organic agricultural tourism in Taiwan; the behavioral characteristics of the participants may differ from other regions due to different cultural backgrounds.Hence, it is suggested that future researchers pay more attention to cross-cultural research.

Conclusions
One of the outstanding contributions of this study is to supplement the research gap of attachment theory on environmentally friendly behavior.This study verified the positive and significant impact of attachment on pro-environmental behavior and wellbeing from four aspects through quantitative research methods.The results can serve as a basis for understanding and motivating tourists' pro-environmental behaviors and assist them in achieving well-being through organic agriculture tourism.Therefore, creating and verifying the establishment of a new theoretical framework is undoubtedly a great academic contribution to the relevant fields.In addition, this article supplements the relevant literature on organic agricultural tourism.Further, through academic research, it reveals to relevant managers which factors have the most significant impact on agricultural and environmental protection and what effect this pro-environmental behavior has on tourists' well-being.Finally, this research responds to the SDGs' call to bring industrial development recommendations to managers or operators of organic agritourism through academic research.
This study found that in addition to place attachment, activity and product attachment significantly affect environment-friendly behavior, which not only supplements the gap of previous research in academia but also brings some inspiration to practice.As previously mentioned, organic agricultural tourism supplements the income of organic farmers and promotes environmental education to tourists.Therefore, destination managers and marketers should attract tourists through event planning and the promotion of organic agricultural products.These activities will further stimulate the tourist's protective feeling toward the environment and enhance their pro-environment behavior during travel.

Table 1 .
Descriptive characteristics of the samples.

Table 2 .
Result of the confirmatory factor analysis.

Table 3 .
Discriminant validity of the constructs.

Table 4 .
Tested results of hypotheses.