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

Fact 2: Many marine species are used for medical research.

Given the two facts above, answer the question "what are many organisms found in shallow coastal waters used for?" with the following options: 
- heat produced
 - survival
 - surf boards
 - density
 - heat energy
 - Animal survival
 - shoes
 - medical research


 

        medical research 