The greatest source varies on age location etc. but mine is from a drinking fountain.
Large body of water surface
Water is evaporated from any body of water and from any other source.
Water balance refers to the amount of water gained and lost by the body.
Drinking water
digestion of food and burning of its energy.
Water
river
Water
water dummy
Lake Michigan
A spring or a river are two sources for a body of water. Spring snow melt or 'runoff' can be a seasonal source. Melting glaciers are also sources.
h2o or water