What region is Estonia in? My teacher gave me this map in the picture for the question, but I think that Estonia is in Northern Europe. Not Western Europe or Eastern Europe.

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.