Which of the following is NOT an agent of erosion?

Irrigation is not considered an agent of erosion because it primarily refers to the artificial application of water to soil for agricultural purposes, rather than a natural force that causes erosion. Agents of erosion, such as wind, water, and gravity, actively transport and wear away materials from one location to another.

Wind can lift and carry small particles, particularly in dry environments, causing erosion by removing topsoil. Water, through processes like rainfall and river flow, can erode soil and rock more powerfully over time, shaping landscapes. Gravity contributes to erosion by facilitating the movement of rocks and sediment down slopes, resulting in processes like landslides.

In contrast, irrigation's goal is to support plant growth and agriculture, which can sometimes prevent erosion rather than causing it. Therefore, it does not fit the definition of an agent of erosion.