You are presented with the question "When a doorbell rings, what part of the body vibrates?" and the following answer choices: 
- organ
 - legs
 - nerves
 - arm
 - cells
 - eye
 - eardrum
 - Limbs

Now knowing that adoorbell converts electrical energy into sound and when the sound waves hit the eardrum in the middle ear, the eardrum starts to vibrate, choose the best answer.


 

       eardrum  