An agricultural practice that helps prevent soil erosion is: *

The correct answer is: d) All of the above

Contour farming, terracing, and cover cropping are all agricultural practices that help prevent soil erosion.

• Contour farming is a method of farming that involves planting crops across the slope of the land, rather than up and down the slope. This helps to reduce the amount of water that runs off the land, which can carry away soil with it.
• Terracing is a method of farming that involves creating a series of steps on a slope. This helps to slow down the flow of water, which can also help to reduce soil erosion.
• Cover cropping is a method of farming that involves planting cover crops, which are crops that are grown specifically to protect the soil. Cover crops help to prevent soil erosion by holding the soil in place and by reducing the amount of water that runs off the land.

All of these practices are important for preventing soil erosion, which is a serious problem that can lead to a loss of topsoil, a decrease in crop yields, and an increase in the risk of flooding.