Fact 1: Aflashlight requires a source of electricity to produce light.

Fact 2: Batteries are a better source of DC electricity.

Given the two facts above, answer the question "what does a flashlight require to produce light?" with the following options: 
- condensation
 - energy
 - direct energy
 - batteries
 - sunlight
 - h2o
 - energy usage
 - heat energy


 

    batteries     