If the environment changes quickly and no individual members of a species are able to survive in the new environment, then the species will
A.
become extinct.
B.
begin mating with other species.
C.
turn into a different species.
D.
not be affected.

Write a 150-word essay describing the effect of people's activities on the environment in the region.

There is only one climate type in motion across the world at a time

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.