Which is the most important reason to continue efforts to preserve coral reefs

Coral reefs support a wide variety of organisms. They are very sensitive and are a main part in the ocean life.

a.

Coral reefs are a valuable commodity in the aquarium business.

b.

Coral reefs support a wide variety of organisms.

c.

Coral reefs are one of the oldest ecosystems.

d.

Coral reefs are important for marine recreation.

Its B Coral reefs support a wide variety of organisms.