You are presented with the question "What is emitted light used for ?" and the following answer choices: 
- electricity
 - To see in the dark.
 - activation energy
 - heat energy
 - kinetic energy
 - an electron microscope
 - major threat to health
 - Electrical energy

Now knowing that alight bulb is used for seeing in the dark and light is emitted by a light bulb, choose the best answer.


 

  To see in the dark.       