How do charities avoid paying the taxes that other firms must pay

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 is the amount of organic matter in all living organisms in a habitat called?

How can you use a maps legend to plan your travel