The Appalachian mountains & the Rocky Mountains :)
Answer:
There are two things that cause landforms on the Earth's surface to change. These are human forces and forces in nature. Human Forces include Possibilism where humans change a surface for their own gain. Natural forces inclyse daily processes of precipitation, wind and land movement result in changes to landforms over a long period of time. Driving forces include erosion, volcanoes and earthquakes.
