Answer:
Self expansion model.
Step-by-step explanation:
This can be said to be a theory that explains that one needs each another to make himself better and grow better as human. This is seen to be an attachment formed romantically or a familial form. According to research, it said to be based on two principles which the first says that humans have a primary motivation that persist him to self expand while the other(second) states that self expansion is achieved by inclusion of another human being.
It is seen also that even hough close relationships can give us a rich source of potential expansion, people are seen to experience also this type of growth in other ways which include spirituality,interactions with valued objects and also creativity.