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...
<u>━━━━━━━━━━━━━━━━━━━━</u>
They created the number system and discovered that the earth was round by studying eclipses.
Hope this helps.
Answer:
The most significant takeaway of this case is the legal precedent that it created for any future case that might use the recorded messages as evidence against a person.
Muslims pray toward the city called Mecca
Well, I'm not sure which war you're referencing. But, if it's WWI, they did it through war bonds and taxes. Mostly war bonds.