You are presented with the question "What energy does a door doorbell need to be heard through speakers" and the following answer choices: 
- consumers
 - Solar
 - Motion
 - to move people
 - sensory neurons
 - Wind
 - it needs them
 - Electrical

Now knowing that adoorbell converts electrical energy into sound and speakers convert electrical energy into sound waves, choose the best answer.


 

        Electrical 