After weathering processes have had their actions on the earth materials making up the surface of the earth, the geomorphic agents like running water, ground water, wind, glaciers, waves perform erosion. It is already known to you that erosion causes changes on the surface of the earth. Deposition follows erosion and because of deposition too, changes occur on the surface of the earth.
As this chapter deals with landforms and their evolution ‘first’ start with the question, what is a landform? In simple words, small to medium tracts or parcels of the earth’s surface are called landforms.