Fog is formed by water vapor condensing in the air, and fog is essentially very low clouds, consisting of water vapor cooling and beginning to condense. Given these facts, what happens when water vapors cool down among the following options:
- colder weather
 - Fog is formed
 - Heat energy
 - evaporation
 - chemical changes
 - Something to move
 - prolactin release
 - Energy.


 

  Fog is formed       