Final answer:
The rapid expansion of urban populations in the North during the Industrial Era led to social unrest and a demand for change.
Step-by-step explanation:
The rapid expansion of urban populations in the North during the Industrial Era led to social unrest and a demand for change. As cities grew and industrial workers migrated from rural areas to urban centers, they faced new social problems such as poor living conditions, poverty, and dangerous working conditions. Segregation and prejudice were also present, leading to racial tensions and race riots. Workers faced poor living conditions and dangerous working conditions, racial tensions increased, and demands for workers' rights and governmental intervention grew. These issues prompted demands for workers' rights, women's rights, and government intervention to address the social problems resulting from urbanization.