Final answer:
The statement is false; sub urbanization has led not only to residential dispersion but also to the movement of businesses and employment opportunities from central cities to suburban areas, negating the premise that the central city remains the sole employment focus.
Step-by-step explanation:
The statement in question can be considered false. While it is true that the phenomenon of suburbanization has led to a dispersion of the residential population, it is not accurate to say that the central city has remained the sole or primary employment focus of the suburban population. Over the years, as the suburban populations grew, employers also began to move their businesses to the suburbs. This shift was partly because of the overloaded highway systems that could not efficiently handle the volume of commuters heading to inner-city jobs and the lure of cheaper land in the suburbs. This movement of businesses and offices resulted in many people finding employment opportunities closer to their suburban homes, thus reducing the requirement for daily commutes to the central city.
Additionally, the sub urbanization trend has hidden many of the urban core problems by creating affluent suburbs with more robust local governments and schools, which have effectively attracted new employers. The concept of 'white flight' further altered employment patterns by moving tax revenue and businesses from the city core to the suburban edges, challenging the notion that central cities remained the employment focus. This has not only transformed the employment landscape but also contributed to issues like traffic congestion and increased pollution due to higher dependency on automobiles for commuting.