Here's why:
* Erosion is the process of breaking down and transporting rock and soil. This can be caused by wind, water, ice, and even biological activity.
* Mountains are formed by tectonic activity, where the Earth's plates collide and push up the land.
* Erosion acts as a counterforce to uplift. As mountains are raised, erosion gradually wears them down.
Think of it like this: Imagine building a sandcastle. The sandcastle (mountain) is built up, but the wind and waves (erosion) gradually erode it, causing it to become smaller over time.
While erosion does not cause mountains to rise, it does play a role in shaping their appearance and influencing their evolution.