You are presented with the question "What converts chemical energy into what we hear?" and the following answer choices: 
- Gunshots
 - An object is seen
 - a lightbulb
 - ice
 - sensory neurons
 - a firecracker
 - animals
 - a stove

Now knowing that afirecracker converts chemical energy into sound and hearing is the act of perceiving sound, choose the best answer.


 

      a firecracker   