You are presented with the question "What are used for seeing in the absence of light?" and the following answer choices: 
- light bulbs
 - cactuses
 - satellites
 - microscope
 - photons
 - bushes
 - energy
 - focusing a lens

Now knowing that alight bulb is used for seeing in the dark and just as darkness is the absence of light, choose the best answer.


 

 light bulbs        