Fact 1: Corals form large colonies in shallow tropical water. Fact 2: Coral reefs are made up of the accumulated exoskeletons of the coral polyp. Given the two facts above, what forms in shallow tropical water?

pick from the following. A. blobfish; B. sub-units of species; C. accumulated exoskeletons; D. aqueous solution; E. polar bears; F. an area swollen with pus; G. swamp vegetation; H. deep-sea dwellers;
Answer:
C.