Ans. Erosion is the process by which soil, rock, and other materials are gradually worn away and transported by natural forces such as wind, water, and ice. It plays a significant role in shaping landforms. For example, rivers erode the land to form valleys and canyons, glaciers erode mountains to create U-shaped valleys, and coastal erosion leads to the formation of cliffs and beaches. Erosion can also contribute to the formation of landforms like caves and arches.