W. X. Y. Z = (1/2)(1/2)(1/2)(1/2)
= 1/16
or
= 0.0625
The sun. The sun provides the energy for evaporation and even for the rest of the water cycle without the sun it wouldn't work. Unless you had a giant heat lamp over the ocean lol
The atmosphere and ozone layer
Tsunamis can only occur in water.