Fact 1: Marine species live mainly in shallow coastal waters.

Fact 2: Along the coastal zone are situated shallow banks which are very rich in fish.

Given the two facts above, answer the question "Marine species live mainly in waters which are very rich in what" with the following options: 
- liquid
 - energy
 - salt
 - fish
 - oxygen
 - life
 - matter
 - Carbon


 

    fish     