Explanation:

- Option 1: Negative reciprocity

This refers to an attempt to get something for nothing or to take advantage, often from strangers or outsiders. It’s more about self-interest, not giving it up.

- Option 2: Balanced reciprocity

Involves an equal exchange of goods or services between people who know each other. There is an expectation of a return of equal value.

- Option 3: Generalized reciprocity

This means giving without expecting an immediate return, often for mutual benefit. It’s about putting aside self-interest for the welfare of others, often seen among close kin or friends.

- Option 4: Exchange of gifts

While this can sometimes involve mutual benefit, it’s a broad term and doesn’t specifically mean giving up self-interest or hostility.