Which of the following rivers is shown on the map above?
A.
the Murray River
B.
the Darling River
C.
the Waikato River
D.
the Sunderland River

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.