I’m 2009, agriculture production in africa had since 1960

You could say the relative location of washington, d.c.

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.

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?