Fact 1: When electricity flows to a light bulb , the light bulb will turn on.

Fact 2: Electrical energy is also energy.

Given the two facts above, answer the question "What happens when energy flows into a light bulb?" with the following options: 
- heat energy
 - dangerous
 - its destroy matter
 - it destroys light
 - it turns on
 - it grows
 - sunlight
 - It expands


 

     it turns on    