Which of the following prevents soil erosion?

The soil particles get washed away in the valleys, oceans, rivers, streams etc. This has been worsening due to human activities such as agriculture and deforestation.

Forests help to prevent soil erosion as they decrease the impact of rain on the ground. The water from the leaves and branches drains down and is soaked into the soil rather than forcefully hitting the ground, which reduces the amount of soil being washed away with the rain.