(Urbanization and Growth of cities) Functionalist Perspective
Ecological Model Theory:
-Concentric Zone Model: due to invasion, succession, and gentrification, cities are a series of circular zones, each characterized by a particular land use.
-Sector model: cities consist of wedge-shapes sectors, based on terrain and transportation routes, with the most-expensive areas occupying the best terrain.
-Multiple nuclei model: cities have more than one center of development, based on specific needs and activities.