You are presented with the question "What helps people see?" and the following answer choices: 
- cameras
 - plastic
 - bushes
 - an electron lens
 - focusing a lens
 - blinds
 - flashlights
 - dolphins

Now knowing that aflashlight requires a source of electricity to produce light and good lighting helps people see steps down, rugs or other obstacles, choose the best answer.


 

       flashlights  