Aqueous fans are cube shaped features that are created when streams that originate in mountainous terrain (such as mountains) fall over considerably plain terrain.
A stream is any body of flowing water, regardless of size. A river is a significant stream that flows in a channel and downhill. Rivers that empty into various oceans are separated by a continental divide. The river may form a delta if it discharges silt.
A stream is a collection of objects that can support several operations and be pipelined to create the desired outcome. A stream accepts input from Collecting, Arrays, or I/O channels; it isn't a data structure.
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