You are presented with the question "many corals secrete an exoskeleton that builds up to become what?" and the following answer choices: 
- important habitats
 - jungles of the sea
 - seaweed
 - gastropod shells
 - food and shelter
 - dolphins
 - major threat to health
 - oceans

Now knowing that many corals secrete an exoskeleton that builds up to become a coral reef and coral Reefs Coral reefs are the jungles of the sea, choose the best answer.


 

  jungles of the sea       