During the water cycle, the sun's energy evaporates water from the surface of earth. this water is the source of
a) respiration.
b) transpiration.
c) precipitation.
d) ozone depletion.

The answer is C. Precipitation, throughout the water cycle water is flowing through our stratosphere. At one point in the water cycle water builds up into clouds, and then that water become heavy forming droplets, which then fall to the Earth and form pools of water. Then when the Sun heats the water the water evaporates and goes through the water cycle in endless loop.