European colonization of Africa was mainly due to its need for raw material.
The invasion, territorial split, colonization and annexation of African territories during the period of the New Imperialism was know as The race for Africa, period which protracted from the 1880s to the beginning of World War I.
By the early twentieth century much of Africa, except Ethiopia and Liberia, had been colonized by European powers, despite the resistance Africa put up against the attempt to colonize their countries.
The answer is bike 7. Increasing stops there
Slavery was found upon the Chesapeake Bay along with eastern
Virginia; plus the south Carolina and Georgia coasts; in a crescent of
lands in Georgia, Alabama and Mississippi; and most of all in the
Mississippi River Valley.