The movement of sediment from one place to another by wind, water, waves, gravity, or glaciers is known as erosion.

- Water: Water is a key agent of erosion, especially in the form of rivers, streams, and rainfall.

- Wind: Wind erosion is prominent in arid and semi-arid regions, where strong winds can carry away loose sediments.

- Waves: Waves generated by oceans, lakes, or rivers can cause coastal erosion, shaping shorelines and cliffs.

- Gravity: Gravity-driven erosion occurs when materials like rocks and soil are transported downslope due to gravitational forces. This includes landslides, avalanches, and debris flows.

- Glaciers: Glaciers act as powerful erosive forces as they move slowly over the land, scraping, grinding, and carrying away sediments.