Fact 1: Water causes refraction of light.

Fact 2: Refraction is the bending of a ray of light.

Given the two facts above, answer the question "What can water cause?" with the following options: 
- exposure to cold
 - The bending of a ray of light
 - atmospheric depletion
 - pressure differences.
 - decreases the freezing point
 - negative impact
 - wind and erosion
 - a lot of human deaths


 

  The bending of a ray of light       