Sedimentary rocks are often found in which type of formation

Where does the availability of water pose the greatest problem

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.

Landmasses on a flat map look distorted because