What three legacies did lewis and clark leave behind?

Their ethnography, zoology and botany contributed greatly to the scientific literature.

Explanation:

on a mission to explore the Northwest from the Mississippi River to the Pacific Ocean.

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

so they can defeat there oppenent