What are the major components of a watershed?

Answer 1

The simple definition:
It's the area of land that catches rain and snow and drains or seeps into a marsh, stream, river, lake or groundwater.

Answer 2

All of the waterways that contribute to the source of water for a major water route is considered a watershed. For instance, the watershed for the Mississippi River covers almost 41% of the continental US.

Answer 3

water...land...plants sunlight...birds...bees....beavers....algae ...paramecium...