How does the geography of the route followed by the corps of discovery make movement difficult for explorers? (The Louisiana purchase)

steep Rocky mountains with snowstorms, river upwards towards highest point of mts 7,032 above sea level

steep Rocky mountains with snowstorms, river upwards towards highest point of mts 7,032 above sea level

Explanation:

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i hope this your understandings.

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.