Which sources contribute to a river system

Explanation:

we can conclude that groundwater, rivers, and streams are the water sources that contribute to a river system.The source of a river or stream is the original point from which the river flows. It may be a lake, a marsh, a spring or a glacier. This is where the stream starts. The source is the farthest point of the river stream from its estuary or its confluence with another river or stream.Evaporation /Transpiration to Precipitation to Runoff/Infiltration. Once precipitation occurs it can either go to runoff or infiltration. What are the three main parts (zones) of a river system? The tree main zones of a river system include sediment production, sediment transportation, and sediment deposition.

it would be a gas formation