Answer:
When the velocity of wind or water slows, eroded sediment is deposited in a new location. The sediment builds up in a process called sedimentation and creates fertile land. River deltas are made almost entirely of sediment that has eroded from the banks and bed of a river.
There are many landscape features specifically associated with rivers: V shaped Valleys - particularly in their upper parts, rivers often form V-shaped valleys whereas glaciers commonly form U-shaped valleys. The V-shaped valley is created by erosion. Meanders - the curves or bends of a river.
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