You are presented with the question "Coral reefs provide food and shelter to animals that require what?" and the following answer choices: 
- Light
 - beaches
 - survive
 - salinity
 - land
 - sand
 - Energy.
 - Energy

Now knowing that coral reefs provide food and shelter to many ocean organisms and salinity is vital for animals that live in the ocean, choose the best answer.


 

    salinity     