Question

post test: exploring geography
the grand canyon, pictured, was created over millions of years as the colorado river cut through the land. what is the process?
a. tectonics
b. erosion
c. mining
d. subduction

Explanation:

The Grand Canyon formed as the Colorado River gradually wore away and cut through rock layers over millions of years. This process of natural wear and removal of rock/soil by water is defined as erosion. Tectonics refers to crustal plate movements, mining is human-driven excavation, and subduction is a plate tectonic process where one plate moves under another, none of which match the described formation process.

Answer:

B. erosion