This time period is generally called the Islamic Golden Age. Name three areas in which these civilizations excelled.

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.

answer; i believe the correct answer is (the willamete valley);

these civilizations were located around fertile rivers, where they could produce an abundance of crops

companies passed on production and transportation costs to consumers