Final answer:
Mid-sized developments intended for self-sustainability are known as Ecovillages, focused on environmentally friendly living and differentiated from larger urban areas like Megalopolis, suburbs, and conurbations. Option B is correct.
Step-by-step explanation:
Mid-sized developments built with intentions of self-sustainability are best described as Ecovillages. These are communities designed to be environmentally friendly, often featuring energy-efficient buildings, shared community spaces, and a focus on local food production and renewable energy sources.
Ecovillages are part of a broader movement towards sustainable living and can be contrasted against larger urban developments, such as a Megalopolis, which is an extensive urban area resulting from the merging of several cities or towns.
The term 'suburbia' typically refers to residential areas on the outskirts of a city, while 'conurbation' is similar to megalopolis, indicating a region comprising a number of cities, towns, and other urban areas that, through population growth and expansion, have merged to form one continuous urban or industrially developed area.
The concentric zone model of urban land use suggests that Zone B would likely house b. Wealthy commuter homes. The creation of the exurbs was led predominantly by the phenomenon of urban sprawl, increasing population in the cities, and the desire for more living space, which is further from the city center than the suburbs.
The expansion of suburbs and exurbs led to the development of New Urbanism to address the various issues related to urbanization, including increased commuting times and natural resource use.