Broad areas of folded rock layers that resemble an upside-down bowl are called

The point where two air masses meet is called a

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.

Advantages and disadvantages of mitigation and adaptation