What state in the us has the least agriculture? where is it difficult to grow food?

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.

Name the country with the highest population in africa?