1. Water: Water is the most common and widespread agent of erosion. It can erode soil, rocks, and other materials through processes such as rainfall, runoff, and flooding.

2. Wind: Wind can also cause significant erosion, particularly in areas with loose, dry soil. Strong winds can pick up and transport soil particles, creating features such as sand dunes and dust storms.

3. Ice: Ice can also act as an erosive agent, especially in cold environments. Glaciers and ice sheets can move and transport large amounts of rock and soil, while icebergs can break off and transport sediments to new locations.