Three months<span>, </span><span>two weeks and four days </span>
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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The whale shark. Usually not seen as a vicious predator, it still is the largest fish.
Answer:
The coal-fired steam engine was soon developed. It became the key technology of the Industrial Revolution. In preindustrial Europe, water power was widely used as a source of energy. By the late 1700s, however, steam engines had been perfected