Context: Erosion is what happens when loose pieces of rock are carried away by water, wind, or ice.
This is a picture of the Grand Canyon. The Grand Canyon was formed as a result of erosion over millions of years.
What evidence of erosion does this picture show?
A. There is a deep, narrow canyon.
B. The rocks in the canyon have a reddish color.
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

A