Which method is most likely to slow down soil erosion?

Planting trees along cliffs is a highly effective method to slow down soil erosion due to their extensive root systems. These roots help anchor the soil in place, reducing the likelihood of soil being washed or blown away during heavy rains or strong winds. The trees also provide shade, which can help maintain moisture levels in the soil and create a more stable environment for the surrounding vegetation. Additionally, the canopy of leaves can intercept rainfall, further reducing the impact on soil directly below.

In contrast, while nitrogen-rich fertilizers can improve plant growth, they do not directly address the mechanics of soil erosion. Keeping grasses trimmed short can actually expose soil to erosion risks as shorter grass may not stabilize the soil as effectively as taller grass can. Building houses on stilts does not affect soil erosion in natural areas; it is primarily a structural solution for living above ground and does not contribute to soil stability or protection. Thus, planting trees provides a direct and effective method for minimizing soil erosion.