Answer :
the movement of water across the soil surface of a watershed and into the river or stream and this movement is enhanced by gravity .
The force that pulls items toward the center of a planet or other entity is called gravity. All of the planets are kept in orbit around the sun by gravity.
Why don't you just float off into space when you jump up like that? Why do objects fall to the ground when you throw or drop them? Gravity, an imperceptible force that draws things together, is the solution. You remain on the ground thanks to Earth's gravity, which also causes objects to fall.
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