Fact 1: Arainbow is formed by refraction of light by separating light into all different colors.

Fact 2: Water vapor bends the light.

Given the two facts above, answer the question "Rainbows are formed via " with the following options: 
- sunlight
 - streams
 - photons
 - water vapor
 - water cycles
 - water tables
 - just light
 - condensation


 

    water vapor     