How did human societies begin to change at the conclusion of the last Ice Age? A. War between the tribes occurred

B. Hunting techniques improved

C. Permanent settlements formed

D. The first cave paintings appeared

What characteristic of the basin that feeds the congo river system affects movement in central africa? a. the center of the basin is a dense rain forest. b. it is the center of ethnic conflict in the area. c. wildlife on the savanna makes it too dangerous to travel. d. the basin is surrounded by desert.