Which of the following mountain ranges found in the united states is highly eroded?

1. Rocky Mountains

2. Sierra Nevada range

3. Cascade Mountains

4. Appalachian Mountains

The answer is 4) Appalachian Mountains.

All the mountain ranges listed have, of course, experienced a certain level of erosion. However, the Appalachian range is the most heavily eroded. It was once almost as high as the Rocky Mountains, which has an elevation of 4,000 meters, but erosion has brought its elevation down to around 2,000.