The eruption of a volcano The erosion of the walls of a canyon The uplifting of mountain ranges The forming of dunes or mounds in a desert
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Roger poured water over a pile of sand. Some of the sand washed away. This process is similar to which of the following?
Possibilities:
- The eruption of a volcano
- The erosion of the walls of a canyon
- The uplifting of mountain ranges
- The forming of dunes or mounds in a desert

The erosion of the walls of a canyon