You are presented with the question "Telephones are used for communication by transmitting what?" and the following answer choices: 
- encoded information
 - Electrical energy
 - music
 - chemical messengers
 - telephone messages
 - audible waves
 - pictures
 - electricity

Now knowing that telephones are used for communication by two people by transmitting sound and when a wave is audible, it is called a sound wave , choose the best answer.


 

      audible waves   