Question

Explain how a Coral reef both living and dead?

Answer 1

Coral reefs are made by small animals the look like flowers. These animals make tubes and shells to live in. The secrete a concrete like material. This part of the animal is completely and totally dead. The rest of the animal is alive living.

Answer 2

Only the outer layer of the reed is alive, as coral colonies grow and expand and new corals build their skeletons on those dead corals from earlier generations.