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>
Answer:
The Greeks/Athenians only lost around 192 men, whilst the Persians lost around 6,400 men.
Answer:
The answer Is D Democracy
The populist demanded "Decrease Immigration"
I believe the answer is B.