Question

Fish rely on coral for _______.

Answer 1

Fish rely on coral for food and shelter.

Almost 1/3 of all marine fish have lived in coral reefs as shelter and protection from their predators. 
Coral reefs are also home to various algae and fungi which in turn becom fish food. 

Fish and other marine animals provide nutrients for the coral reefs to grow while coral reefs provide fish and marine animals protection and shelter.

Answer 2

The answer for this question is "D".