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

Fact 2: Sonar bounces sound waves off the bottom of the ocean.

Given the two facts above, answer the question "Bouncing sound waves off the bottom of the ocean is used to find what?" with the following options: 
- locations of objects
 - body water
 - one celled organisms
 - hidden communities
 - atlantis
 - underwater cities
 - food and shelter
 - electromagnetic energy


 

 locations of objects        