On the Atlantic Oceanfloor, there is a long ridge of underwater mountains caused by volcanic eruptions. New volcanoes keep erupting, and new mountains keep forming. Why is this happening?

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.