Explanation:

- Option 1: Levi-Strauss

- Claude Levi-Strauss was an anthropologist known for his structuralist theories.

- He explored the concept of reciprocity through kinship and myth analysis, emphasizing exchange systems.

- Correct Answer

- Option 2: Durkheim

- Emile Durkheim was a sociologist famed for his work on social cohesion and collective consciousness.

- His focus was more on mechanical and organic solidarity.

- Option 3: Cooley

- Charles Horton Cooley introduced the concept of the "looking-glass self."

- He focused on social identity and interpersonal relationships, not barter exchange.

- Option 4: Malinowski

- Bronislaw Malinowski was an anthropologist who studied the Kula ring, an exchange system, but didn't develop a theory of reciprocity based on barter.