Fact 1: Alight bulb requires electrical energy to produce light.

Fact 2: Electrical energy is also energy.

Given the two facts above, answer the question "What requires energy to produce light?" with the following options: 
- humans
 - an object
 - gasoline
 - tulip bulb
 - to move people
 - light bulb
 - microscope
 - cactuses


 

      light bulb   