The US shares borders with two countries. are all of these countries in the same cultural region?

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.

Alow-pressure belt means the air is cold and dry warm and rising cold and sinking warm and moist

Can someone answer all these questions i need it done by tonight. once again