Answer:
--helps bind people together by creating bonds of mutual obligation.
---is only appropriate when people do not expect anything in return for their gift.
Explanation:
Reciprocity is the act of giving a person a gift without expecting something in return. Generalized reciprocity creates a moral obligations among the people in the society. This is usually practiced among common friends and people who are closely attached to one another.
When there is a reciprocity, a smile or love or kindness or thank you is always included in the exchange. It binds the people together and bring them close top each other in the society by binding them with mutual obligations.