You are presented with the question "what produces a flow of electrons" and the following answer choices: 
- direct energy
 - jumping
 - the wire
 - a shoe
 - rays or beams
 - Light
 - a battery
 - energy

Now knowing that abattery converts chemical energy into electrical energy and if we disconnect the battery, the flow of electrons is no longer driven by the chemical forces in the battery, choose the best answer.


 

       a battery  