* Geosphere: The geosphere is the most directly involved. Erosion wears away rocks, soil, and other materials from the Earth's surface, shaping landscapes and influencing the formation of landforms.

* Hydrosphere: Water plays a crucial role in erosion. Rain, rivers, oceans, and glaciers all contribute to eroding materials. Water's power can carve canyons, transport sediment, and reshape coastlines.

* Atmosphere: The atmosphere influences erosion through wind. Wind can pick up and carry loose materials, creating sand dunes and eroding rock formations. Weather patterns, like storms, can also contribute to erosion by increasing the power of wind and water.

* Biosphere: Living organisms, like plants and animals, can contribute to erosion. Plants can help prevent erosion by anchoring soil with their roots, but they can also contribute to erosion by creating pathways for water flow. Animals, particularly grazing animals, can trample vegetation, leaving soil exposed to erosion.

Therefore, erosion is a complex process driven by the interplay of all four Earth spheres.