South Korea artist/sculptor
The United States first began developing nuclear weapons in 1939, during World War II, under the order of President Franklin Roosevelt. Motivation was the fear that US was engaged in a race with Nazi Germany to develop nuclear weapon. This project is best known as Manhattan Project.
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Answer:
A census; had an accurate account of the number of people that lived in the states.
Explanation:
I don’t know if this is what your book is wanting but this is all I could find.
Hope this helps!
Early humans were most likely the natives and british they discovered most of our land we have today