Explanation:

- The Chicago School is credited with developing the ecological approach to urban analysis.

- This approach studied cities as environments, using ideas from ecology to analyze urban life and social structures.

- Key figures like Robert Park and Ernest Burgess examined how people and groups interacted within urban environments.

- The Frankfurt School focused on critical theory, media, and culture, not ecological urban studies.

- The Vienna School mainly involved art history and psychoanalysis, not urban ecology.

- The Manchester School is known for social anthropology, especially community studies in Africa.

- Correct Answer:

- Option:3, Chicago School