The correct answer is C. Freedmen's Bureau
This federal government agency helped former slaves tremendously during the era of Reconstruction in the South. This program was highly effective in helping thousands of African-Americans in the South. However, this program was short lived and Congress abandon it in 1872, just a few years before the official end of the Reconstruction era in the South.
Stonehenge. Historical site of England, and one of the ancient wonders.
A similarity between the separation of powers, the system of checks and balances, and federalism is that they all are meant to keep the federal government from becoming too powerful and tyrannical.
Larger in size. If you mean the damage by “size”, then Hiroshima was a lot worse than Nagasaki which means larger.
I don’t see the attached image