Why was it that technological advancements made in Africa were not enough to propel Africa's economy upwards?

The african continent is home of the worlds largest desert and longest river . t or f

What geologic process is related to caldera formation?

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.