Young Stream or Young River whichever works
Rapids
fsdtgasyvtbg jfbgudsf hbfghbfvhsf
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.
Gulf Stream
Channel (Valley)
Huang he is the river that flows through china.
A small valley through which a stream or creek flows is commonly referred to as a "hollow" or "glen." These features are typically characterized by their gentle slopes and often lush vegetation, as they provide a natural pathway for water runoff. The flowing water can create a unique ecosystem, supporting various plant and animal life. Additionally, hollows and glens are often scenic spots popular for outdoor activities such as hiking and fishing.
it could be a valley or a gorge
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.
That is a glacier. Glaciers form from compacted snow that has accumulated over time and flows downhill under the force of gravity.
An ocean current.
Ocean current