Question

Coral reefs are formed by _____
A) volcanic rocks
B) marine sediments
C) chlorine material precipitated from sea water
D) tiny colonial marine animals which construct limestone skeleton material

Answer 1

Coral reefs are formed by : Tiny Colonial Marine Animals called Coral Polyps which construct limestone skeleton material.

Option D is the Answer

Answer 2

D) tiny colonial marine animals which construct limestone skeleton material

option D is the Ans...✔️✔️