They perform the most essential tasks
<em>I think the answer is A.</em>
<em>The reason I say this is because Northern American Indians had access to more trees (depending on where in the North) and they would commonly use baby saplings to not only make tools but their frames for animal hide houses (not exactly Tipis these were shaped like boxes). In the Great Plains there wasn't exactly that much wood but there was however mud, and this led to some of the natives using mud to make Sod houses.</em>
<em>Hope this helps and have a nice day.</em>
<em>-R3TR0 Z3R0</em>
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The shaded area on this map shows the land gained by the Creeks in the Treaty of Fort Jackson. the migration path of the Creeks into the Florida territory. the land lost by the Creeks in the Treaty of Fort Jackson.
I think the answer is letter c. Kepler. There are other scientists that have the same philosophy, they are Copernicus and Galileo. In that book, Newton included that the universe was like a giant clock, for all the parts will work perfectly it required mathematics.