Question

82.
Corals are
1) Poriferans attached to some solid support
2) Cnidarians, that are solitary living
3) Poriferans present at the sea bed
4) Cnidarians that live in colonies​

Answer 1

Explanation:

Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically live in compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.