human
Question: Roger poured water over a pile of sand. Some of the sand washed away. This process is similar to which of the following?

Choices:
A) The eruption of a volcano
B) The erosion of the walls of a canyon
C) The uplifting of mountain ranges
D) The forming of dunes or mounds in a desert
gpt
The correct answer is 1: The erosion of the walls of a canyon.