Final answer:
Southern places became more segregated due to African Americans moving to the North and white flight to suburbs resulting in de facto segregation.
Step-by-step explanation:
In the Southern states, some places became even more segregated due to a combination of factors. One factor was the movement of African Americans to the North during the Great Migration, seeking better job opportunities and to escape discrimination. As they moved, many white people left the cities and settled in newly established suburbs, a phenomenon known as white flight. This resulted in de facto segregation in the North, where African Americans were still segregated despite legal segregation ending in the South.