Valleys and mountain ranges form through a process called tectonic activity. When two tectonic plates collide, it can cause compression and uplift, leading to the formation of mountains. As the plates continue to move, erosion also plays a role in shaping the landscape – rivers and glaciers can carve out deep valleys between the mountain ranges. These processes, along with other factors like weathering, contribute to the formation and evolution of valleys and mountain ranges over long periods of time.
