Agents of erosion are the natural forces that wear away and transport rock, soil, and other materials. Some common agents of erosion include:
* Water: Rain, rivers, oceans, and glaciers are all powerful agents of erosion.
* Wind: Wind can carry sand and dust, eroding rock and shaping landscapes.
* Ice: Glaciers are massive sheets of ice that can carve out valleys and transport rocks over long distances.
* Gravity: Gravity can cause landslides, rockfalls, and other forms of erosion.
So, while a horn is formed by erosion, it is not the agent itself. The agents that create horns are often a combination of glacial erosion and freeze-thaw weathering.