Fact 1: Sonar is used to find the location of an object.

Fact 2: Submarines use sonar to find objects under the water, including other submarines.

Given the two facts above, answer the question "What can sonar be used to find?" with the following options: 
- animals
 - coastlines
 - waves
 - rays or beams
 - submarines
 - water
 - tsunamis
 - patch reefs


 

     submarines    