Based on these maps, which statement best describes the changes to the West Africa during the time of the early African kingdoms (1100-1240)? (WG2A)

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.