How did geography contribute to the rise of ghana mali and songhai

Niger River

Inland Delta

Sahel Region

Sahara Desert

It provided access to the large ports on the Atlantic.

The lack of fresh water made rulers here more warlike.

It provided a place for trade between the North and the South.

The desert was difficult for outsiders to invade.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.