You are presented with the question "What can sonar be used to find?" and the following answer choices: 
- animals
 - coastlines
 - waves
 - rays or beams
 - submarines
 - water
 - tsunamis
 - patch reefs

Now knowing that sonar is used to find the location of an object and submarines use sonar to find objects under the water, including other submarines, choose the best answer.


 

     submarines    