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:
A. election of a national president
Explanation: sale of land, agreements between nations and wars between nations all include relations between multiple nations, however election of a national president is only inside the nation and can’t effect boundaries.
-Hope this helps<3
The ratification of the conventions of nine states, shall be sufficient for the establishment of this Constitution between the states so ratifying the same.
<u>Strategic and Organic Activism:</u>
Strategic activism refers to highly planned involvement that demands nothing else but only the necessary input to be brought into operation to fetch the desired output. On the other hand, organic activism refers to the use of conventional means and methods without putting much emphasis on expected results.
In order to strictly bring about the desired results, it is mandatory to have a strategic plan about what is to be done to achieve only what is wanted. Thus, when an individual or an institution sticks to the plan and operates accordingly, it is referred to as strategic activism. Organic activism, on the contrary, is simply logrolling to get hold of whatever the result is.
Answer:
The answer to this question is A. :)
hope this is right!
Explanation: