Explanation:

- Robert Redfield, Ralph Linton, and Melville J. Herskovits are all well-known for their work on acculturation. They even co-authored an important definition of acculturation in 1936.

- Acculturation refers to the cultural changes that result from continuous contact between different cultures.

- William F. Ogburn was more famous for his theories on social change, cultural lag, and not specifically for Acculturation studies.

Correct Answer:

- Option 4: Ogburn