Prime and composite numbers. is 81 a prime number ir a composite number

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.

Where is the temple of mount located

Which of these has the least impact on the climate of a place