Question

how does coral islands form?​

Answer 1

Explanation:

Coral island is formed by an aquatic animal name coral reef.They have a cover of calcium carbonate.They feed cover of each other. After a long time they make a rock like structure which known coral island.Lakshadweep and Great barrier Reef of Australia is example of coral island

Answer 2

Answer:

Coral reefs begin to form when free-swimming coral larvae attach to submerged rocks or other hard surfaces along the edges of islands or continents. As the corals grow and expand, reefs take on one of three major characteristic structures — fringing, barrier or atoll.