You are presented with the question "What creates sounds?" and the following answer choices: 
- energy of moving objects
 - chemical messengers
 - the body's largest organ
 - peace
 - Thinking hard
 - Blowing a whistle
 - Electrical energy
 - death

Now knowing that blowing air into a whistle causes air to vibrate inside the whistle and sounds are vibrations in air, choose the best answer.


 

      Blowing a whistle   