How does water erosion occur?

Water erosion occurs primarily when the movement of water, such as rivers or rainfall runoff, carries away soil and rock materials. The process involves the physical action of water on the Earth's surface, leading to the breakdown and transport of debris. In the case of option B, the description accurately represents how oceanic waves impact coastal land; they exert force on the land, gradually eroding it over time. This process is driven by the constant motion of waves, tidal actions, and currents, which work to wear away both soil and rock, ultimately reshaping the coastline.

In contrast, the other options describe processes that either do not directly lead to erosion caused by water or involve different mechanisms. For instance, while wind can carry moisture, it does not constitute water erosion itself. Furthermore, precipitation filtering through the soil relates more to the infiltration of water than to soil erosion. Similarly, the absorption of excess water by plants contributes to the water cycle and may prevent erosion by stabilizing the soil, rather than causing it. Thus, the understanding of how oceanic action leads to erosion accurately captures the essence of this geological process.