Answer:
The "grave danger" that the author is talking about is the danger of atomic weaponry
Explanation:
"Preliminary Statement of the Association of Manhattan District Scientists" was a 100-page report written after the atomic bombings in Hiroshima and Nagasaki.
The "grave danger" that the scientist is talking about in the article is the dangers of atomic weaponry. The article talks about the consequences that wrong decisions of leaders may have on its nations.
<em>European Americans were still hateful toward Japanese citizens when they returned home from internment camps because;</em>
A. They were still fearful and racist
The US and the Soviet Union
People choose to live in a larger community during Neolithic age than in earlier times because they required and needed a huge number of people for gathering and hunting. They had an enduring shelter, so people decided to attach to a different group so the communities getting bigger and bigger. And aside from that, they could grow sufficient foods to support more people one of this practice is farming.
The Bureau of Indian Affairs is to mange land, reservations, for the Indian Tribes.
Hope this helps. :)
