Alight bulb is used for seeing in the dark, and incandescent light bulbs use a tungsten filament sealed inside a glass bulb. Given these facts, tungsten filaments sealed in a glass bulb are used for what in the dark among the following options:
- photons
 - energy
 - seeing
 - stay warm
 - sleeping
 - talking
 - communicating
 - heat


 

   seeing      