You are presented with the question "what are used to find the location of an object?" and the following answer choices: 
- A Greek letter
 - satellites
 - electricity
 - rays or beams
 - Firecrackers
 - photons
 - sound waves
 - microscope

Now knowing that sonar is used to find the location of an object and sonar devices use sound waves to find things, choose the best answer.


 

       sound waves  