Question

Valley - The target of
river erosion is to reach at its base level.The base of the sea or lake in which the river falls is called the base level of river erosion. The river makes its
valley deep and widens its banks. It results into V-shaped Valley.
Hindi meanings^ ​

Answer 1

Answer:

In geology and geomorphology a base level is the lower limit for an erosion process. The modern term was introduced by John Wesley Powell in 1875. The term was subsequently appropriated by William Morris Davis who used it in his cycle of erosion theory.