Currents are caused by tempenture and density differences

The country in the world with the largest population is_?

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.

Which of the following types of tourist are best to bring money to the local southeast asian communities