Answer:
THe correct answer is:
The water cycle.
The repeated movement of water between earth's surface and the atmosphere is called the water cycle.
Explanation:
The water cycle is the natural movement process of water through the evaporation, condensation, transpiration and precipitation processes that transport the water from one place to another by changing its states from liquid as rivers and oceans, to gas as clouds and steam, and solid as ice and snow.
Pretty sure it’s air pollution
Less dense then water its self
