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Lewis and Clark traveled from St. Louis, which is beside the Mississippi River. Which of the following correctly describes the land they saw as they traveled to the Pacific Northwest? Flat and low around the Mississippi River, with a sharp and sudden rise to the Rocky Mountains, tapering off slowly to the ocean Flat and low around the Mississippi River, gradually rising to the Rocky Mountains, then tapering off quickly to the ocean Flat but high around the Mississippi River, with a sharp and sudden rise to the Rocky Mountains, dropping off suddenly to the ocean Flat but high around the Mississippi River, quickly rising to the Rocky Mountains, then tapering off slowly to the ocean

This is most likely the environment that Lewis and Clark witnessed as they travelled to the Pacific Northwest. The land around the Mississippi River is generally flat and low. This allows the many tributaries of the river to water a large, very fertile area. However, this low land ends when we get to the Rocky Mountains. The mountains are extremely high and difficult to travel. If we were to get to the other side, however, we would see a slow decrease as we get to the Pacific Ocean.