Sagot :

this helps by making it supported by the roots of trees. It helps by holding the soil and absorbs water that causes the soil to moist. it also helps because of leaves fall in the ground that covers the soil that blocks the droplets of water coming from above.
There are many reasons. I will list some of them down.
1. The leaves of the trees act as an umbrella when it rains. They capture water and slow it down.

2. Dead leaves on the ground will also capture and slow down water as it rains.

3. The roots of the trees will hold together soil so as it rains, the soil will not go with the water.

Hope this helps :)