C. Erosion over a long period of time
The Grand Canyon was formed by weathering and erosion caused by the Colorado River.
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Sexual reproduction results in genetic variation in offspring.
Answer:
Large-scale domestic manufacturing, concentrated in the North, decreased dependence on foreign imports and resulted in an increase in wage labor. The power of the federal government grew under Henry Clay 's American System, which led to many improvements in the form of expanded roadways and canal systems.
Explanation:
