Which of the following is a solution to prevent erosion?

Planting grass and shrubs plays a crucial role in preventing erosion due to their ability to stabilize the soil. The roots of these plants bind the soil particles together, reducing the likelihood of soil displacement caused by wind and water. Grass and shrub cover also act as a protective layer, absorbing the impact of rain and reducing surface runoff, which can carry soil away. Additionally, vegetation contributes to the overall health of the ecosystem by improving soil structure and reducing compaction.

In contrast, options such as building taller buildings, increasing traffic on roads, and using chemical fertilizers do not contribute to erosion control. Building structures can lead to increased runoff and disturbed soil, while traffic can compact the ground and contribute to erosion. The use of chemical fertilizers may enhance plant growth, yet without vegetation to hold the soil, they do not inherently prevent erosion. Thus, promoting planting grass and shrubs is a proactive and effective method for mitigating erosion.