Final answer:
Kai is a border dweller through relationships because he has parents from different cultural heritages, integrating those cultures into his personal identity.
Step-by-step explanation:
Kai is a border dweller through relationships because his identity is shaped by the intimate connections he has with people from different cultural backgrounds, specifically his Thai mother and Korean father. His experiences and the influence of both cultures are brought together in a unique way, which can lead to him developing a bicultural or multicultural perspective. Kai's status is not due to travel, socialization in a particular country, or assimilation into one culture, but rather through the interpersonal relationships with his parents who represent different cultural backgrounds.