Question

select the correct answer from the drop - down menu. the picture shows how the grand canyon looks now. but millions of years ago, this region was completely buried under earths surface. the change that happened over the years was caused by

Explanation:

The Grand - Canyon's formation from being buried to its current state is mainly due to the long - term action of erosion by the Colorado River and other natural forces. Volcanic eruptions and earthquakes are not the main causes of its formation.

Answer:

erosion