Answer :
Meriwether lewis and william clark helped open the american frontier to settlement by expanding knowledge of the continent.
A continent is a huge non-stop mass of land conventionally regarded as a collective region.
A continent is any of several large landmasses. usually recognized with the aid of convention in place of any strict standards, up to seven geographical regions are generally regarded as continents.
The knowledge of the sea and the continents are important as they're a part of the variety we stay in, and to recognize the geology of the Earth.
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