Which factor best suggests a cause for the urban problems shown in this table? (3 points) increasing discriminatory housing practices shifting population density gradients over time declining urban renewal efforts by city governments declining basic employment sector in industrial cities increasing gentrification efforts in the inner cities

Many industrial cities such as Detroit have a history of dominance of employment sector by  industries.These industries paid relatively high wages for low-skilled jobs and gave a sense of security ensured by large unions. But at the same time these safe conditions discouraged workers from starting their own businesses or continuing education.

Hence, Declining basic employment sector in industrial cities  have left them  with a lack of job opportunities for  a poorly qualified workforce pushing many families below the poverty line.

i believe the answer is a

the name of the theory is landmass theory.