Fact 1: Eyes are used for seeing by animals by sensing light.

Fact 2: Lastly Fire, or light, is perceived through the sense of vision.

Given the two facts above, answer the question "eyes are used for seeing by animals by sense of what?" with the following options: 
- energy
 - touch
 - photons
 - vision
 - smell
 - power
 - the sun
 - sound


 

    vision     