8 One common feature of early civilizations was a
OA system of agriculture that depended on growing barley.
ОВ.
vast army used for conquest.
OC. market that surrounded the city walls.
ODruling class made up of a king and religious figures.
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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.

What are the answers for the following questions?

Which of the following are commonly shown as a topographic map