Erosion and Deposition are the two important aspects of the evolution of landforms.
Every landform has a beginning. Landforms once formed may change in their shape, size and nature slowly or fast due to the continued action of geomorphic processes and agents.
Due to changes in climatic conditions and vertical or horizontal movements of landmasses, either the intensity of processes or the processes themselves might change leading to new modifications in the landforms.
Evolution here implies stages of transformation of either a part of the earth’s surface from one landform into another or the transformation of individual landforms after they are once formed.
That means, each and every landform has a history of development and changes through time. A landmass passes through stages of development somewhat comparable to the stages of life — youth, mature and old age.