If dew is formed when vapor changes to liquid, then how is dew formed?

Answer choices:
- When a liquid disappears
 - Vapor turning into a liquid
 - photosyntehsis
 - Something made from fermented ricce
 - a hemisphere is tilted away from the sun
 - Liquid turning into vapor
 - At the peak of a mountain
 - When water evaporates

 

  Vapor turning into a liquid        