Fact 1: Alaser is used for producing light.

Fact 2: Light reveals what lies hidden in darkness.

Given the two facts above, answer the question "What can be used to reveal what lies hidden in darkness?" with the following options: 
- A laser
 - Night
 - photons
 - energy
 - Electrical
 - Blackness
 - heat
 - Hidden health issues


 

 A laser        