You are presented with the question "what flows to a light bulb to turn it on?" and the following answer choices: 
- heat energy
 - protons
 - Solar energy
 - neutrons
 - direct energy
 - energy
 - electrons
 - light switch

Now knowing that when electricity flows to a light bulb , the light bulb will turn on and electricity is electrons in motion, choose the best answer.


 

       electrons  