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What is 1 + 3?
the change of liquid water to water vapor
the evaporation of water from the leaves of a plant
the change of water vapor to liquid droplets
the falling to earth of any form of water (rain or snow or hail or sleet or mist)
the flow of water over the ground surface rather than soaking into the ground
the gathering of run-off water into a body of water (lake, stream, river, or ocean)
the flow of water from the land surface into the subsurface.
the flow of water through soil