The Hopewell people had built mounds throughout the Eastern/Southern part of the U.S. and part of Canada so I don’t believe that there’s one specific state where they are all located in but what I can tell you is that the Great Serpent Mound is located in present day Ohio.
It does not apply to executive orders.
Manifest destiny- the belief that the United States was meant to expand from the Atlantic ocean to the Pacific Ocean.
I hope this helps!
Brainliest answer is always appreciated!