Young Stream or Young River whichever works
a young stream.
it flows rapidly producing a v valley
Rapids
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The stream of water which flows like a river through the ocean is a current. The Gulf Stream is the most significant such current which flows from the tropics to the northern latitudes.
Valley Glacier
Gulf Stream
Channel (Valley)
Huang he is the river that flows through china.
The area of lowland that is between hills and mountains is called a valley. This stretch of low area usually has a stream or river that flows through it.
it could be a valley or a gorge
An ocean current.
Ocean current
It is known as rapids - a length of the river where rocks break the surface and the water is churned into what is known as white water.