The above system of United States Constitution is showing three organs of the state i.e Legislative branch, Executive branch and the Judicial branch.
And below each division, their works are given. Aswecan were that, each of the organ is at same height which shows that they are practicing equal powers and they don't interrupt in each others work.
They practice the system of <u>Checks</u><u> </u><u>and</u><u> </u><u>Balances</u> to ensure that none of the organ is enjoying and grabbing too much.
So, the most appropriate option is:

Checks and balances system.
And, we are done !!
#CarryOnLearning...
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Answer:
The US had the strongest Navy and dominated both the Pacific and the Atlantic uncontested; this didn't change throughout the Cold War, even though naval technologies changed a lot (nuclear subs, etc), and the USSR invested heavily in surface and submarine navies.
Explanation:
The Tet Offensive was a coordinated attack on American and South Vietnamese troops in early 1968 by Vietnam Cong and North Vietnamese troops. The attack had profound political and psychological repercussions on the American domestic front.
<span>Answer is B. Most peasants had been freed from serfdom and were improving their economic situation.</span>
Militarized the rhineland ——> hitler takes over Sudetenland—-> Non aggression pact—-> annexed austria and lastly the axis powers formed