You are presented with the question "Telephones are used for communication by two people by transmitting waves produced by what?" and the following answer choices: 
- The bending of a ray of light
 - movement of tectonic plates
 - the vibrations of soul
 - tectonic plates being pushed together
 - the vibrations of objects
 - the vibrations of the ether
 - movements in the earth's crust
 - the waves of the ocean

Now knowing that telephones are used for communication by two people by transmitting sound and all sounds are waves produced by the vibrations of material objects, choose the best answer.


 

     the vibrations of objects    