You are presented with the question "what does glass cause?" and the following answer choices: 
- contamination
 - water vapor
 - coke
 - Pollution
 - chemical changes
 - oxygen
 - lowered energy cost
 - bending light rays

Now knowing that glass cause refraction of light and refraction Refraction is the bending of light rays, choose the best answer.


 

        bending light rays 