Answer:
D. Running water is acting as a destructive force as it weathers and erodes rock.
Explanation:
Because the rock is breaking, the running water is acting as a destructive force.
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When the price level falls, businesses are unable to sell their products at a price high enough to cover costs they have already incurred, putting producers at risk of failure
The Mexican-American War, waged between the United States and Mexico from 1846 to 1848, helped to fulfill America's "manifest destiny" to expand its territory across the entire North American continent.