Fog is formed by water vapor condensing in the air.
Fog is essentially very low clouds, consisting of water vapor cooling and beginning to condense.
When water vapors cool down, fog is formed in the air.
What happens when water vapors cool down?
A. colder weather
B. Fog is formed
C. Heat energy
D. evaporation
E. chemical changes
F. Something to move
G. prolactin release
H. Energy.