You are presented with the question "What do flashlights require to produce light?" and the following answer choices: 
- sunlight
 - energy
 - a light source
 - batteries
 - circuits
 - energy usage
 - heat energy
 - power

Now knowing that aflashlight requires a source of electricity to produce light and electricity flows when a battery is connected to an object like a watch, toy, or flashlight, choose the best answer.


 

    batteries     