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

Fact 2: Good lighting helps people see steps down, rugs or other obstacles.

Given the two facts above, answer the question "What helps people see?" with the following options: 
- cameras
 - plastic
 - bushes
 - an electron lens
 - focusing a lens
 - blinds
 - flashlights
 - dolphins


 

       flashlights  