Final answer:
The Multiple Nuclei Model assumes the presence of multiple secondary business districts in addition to the primary central business district (CBD) in a city. These secondary nuclei develop due to various factors and contribute to the overall organization of the city.
Step-by-step explanation:
The Multiple Nuclei Model is an urban structure model that assumes the presence of multiple secondary business districts, or nuclei, in addition to the primary central business district (CBD). These secondary nuclei develop due to factors such as transportation networks, historical development patterns, or specialized industries. These nuclei may have their own unique functions and characteristics, which contribute to the overall functioning and organization of the city.
For example, in a city following the Multiple Nuclei Model, there may be separate districts or nuclei for industrial activities, working-class housing, upper middle-class housing, elite housing, light industrial and wholesale activities, commuter housing, and exurban industrial activities.
This model helps to explain the growth and organization of cities that lack a well-developed public transit system and thus experience decentralized patterns of development.