It is a the growth in an economy circulation
African Americans settled in the slum and ghettos of the Northern side changing the demographics of the cities.
Explanation:
Places like Harlem in New York and Compton in California where there were very low income areas settled by predominantly black people in otherwise bludgeoning economies where they became slums is a characteristic of this migration.
As the north did not discriminate as much against the black population they moved over to their side and then they had not enough resources to live their lives well so they lived in the slums they had made.
These slums would remain the usually economically backward areas of the US for long.
I have no idea i have gone over it 20 times and believe me this one is hard but in the lesson its probably the answer i know you can do it
uniqe things like fingerprints and our irises are usually not inherited by our ancestors.