You are presented with the question "Rainbows are formed via " and the following answer choices: 
- sunlight
 - streams
 - photons
 - water vapor
 - water cycles
 - water tables
 - just light
 - condensation

Now knowing that arainbow is formed by refraction of light by separating light into all different colors and water vapor bends the light, choose the best answer.


 

    water vapor     