Final answer:
The concentric zone theory describes a city's spatial structure with areas emanating outward from the CBD, with Zone B housing low-cost housing for immigrant populations and marginal businesses. These zones model urban growth and development dynamics, depicting distinct residential and commercial patterns.
Step-by-step explanation:
The concentric zone theory, proposed by Ernest Burgess in 1925, describes the spatial structure of cities in terms of a series of concentric circular areas emanating outwards from the central business district (CBD). These zones include the CBD (Zone A), areas of transition (Zone B), which house a mix of immigrant groups and marginal businesses and are characterized by formerly wealthy homes converted into low-cost housing, the zone of working-class housing (Zone C) with established ethnic enclaves, the suburbs (Zone D), where you find the domiciles of white-collar workers and shopping centers, and the exurbs (Zone E), containing the estates of the upper class. Although this model was envisioned for the context of American cities, its principles have been used to understand urban patterns globally.
According to the concentric zone model, Zone B is likely to house 'formerly wealthy homes split into cheap apartments', which serve the new immigrant populations, providing an affordable living solution close to the city center. This zone also includes small-scale manufacturers and various marginal businesses that cater to the needs of the local demographic. The model also indicates the presence of distinct residential and commercial patterns as one moves from the center towards the periphery of a city, which reflects the dynamics of urban growth and development.