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.