You are presented with the question "Tungsten filaments sealed in a glass bulb are used for what in the dark?" and the following answer choices: 
- photons
 - energy
 - seeing
 - stay warm
 - sleeping
 - talking
 - communicating
 - heat

Now knowing that alight bulb is used for seeing in the dark and incandescent light bulbs use a tungsten filament sealed inside a glass bulb, choose the best answer.


 

   seeing      