Consider the following statements regarding hanging valleys:
1. Hanging valleys are formed when a tributary glacier joins a main glacier at a higher elevation.
2. After glacial retreat, these valleys often form waterfalls as streams flow over their edges.
3. Hanging valleys are commonly found in desert landscapes formed by wind erosion.
How many of the statements given above are correct?
1
Only one
2
Only two
3
All three
4
None