Answer: elliptical orbits
Explanation:
The answer is A. War, because it is between people (Leaders of nations).
B. Can be caused by people but is a relationship with people and the earth.
C. Cannot be changed by people, so therefor is not between people.
D. Pollution is caused by people, but is a relationship between people and the earth.
The federal government is composed of three distinct branches: legislative, executive, and judicial, whose powers are vested by the U.S. Constitution in the Congress, the President, and the federal courts, respectively. I looked it up and that’s all that came up hope it helps !