External Processes. Some of the external processes that have an impact on landforms are: Denudation: Denudation is a process where the wearing away of the surface of the earth is caused due to moving water, by ice, by wind, and by waves, leading to a reduction in elevation and in relief of landforms and of landscapes.

External process leads to continuous wearing down of the land surface

External processes refer to the various natural forces that act on the Earth's surface, such as weathering, erosion, and deposition. These processes continuously shape and modify the land surface over time. Among these processes, the continuous wearing down of the land surface is a significant outcome.

1. Weathering:
Weathering is the process of breaking down rocks and minerals into smaller fragments. It can occur through physical, chemical, or biological means. Over time, weathering weakens the rocks and makes them more susceptible to erosion.

2. Erosion:
Erosion is the transportation of weathered materials, such as sediment, soil, and rock fragments, from one place to another by natural agents like water, wind, ice, or gravity. Erosion removes the weathered materials from their original location and transports them to new areas.

3. Deposition:
Deposition is the process by which eroded materials are laid down or deposited in new locations. When the transporting agents lose their energy, they drop the sediments they were carrying. This leads to the accumulation of sediments in various landforms such as deltas, alluvial fans, beaches, and riverbanks.

Continuous wearing down of the land surface:
The combination of weathering, erosion, and deposition leads to the continuous wearing down of the land surface. Here's how:

- Weathering breaks down rocks into smaller particles, creating sediment.
- Erosion transports the sediment away from its original location, primarily by water, wind, or ice.
- The transported sediment is then deposited in new areas, building up layers of sediment over time.
- The process of erosion and deposition repeats continuously, leading to the gradual removal and relocation of sediment from one place to another.
- As a result, the land surface is constantly being worn down, and the topography of the area changes over time.

This continuous wearing down of the land surface through external processes is responsible for the formation of various landforms, such as valleys, canyons, gorges, and coastal cliffs. It plays a crucial role in shaping the Earth's surface and influencing the overall landscape.