You are presented with the question "How are rainbows formed?" and the following answer choices: 
- photosynthesis
 - Light passing through water
 - Cold air mixing with water
 - Hot air passing through water
 - Evaporation of water
 - focusing a lens
 - photosyntehsis
 - Water passing through light

Now knowing that water causes refraction of light and rainbows are formed when sunlight is refracted through raindrops, choose the best answer.


 

  Light passing through water       