Africa contained far more natural resources than europe ever had, and european capitalists soon
realized what wealth could be gained by exploiting these resources. what two raw materials became
the most profitable for european imperialists?

I'll go with that

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.