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>
<span>The correct answer is the federal system. Power is shared between the two governments and states have the right to make their own laws as long as they're not unconstitutional or against the federal law. Federal law applies to all the states in a federation, like the United States has in the congress.</span>
It was used for labor needs in gathering resources in Africa in other for the European to prosper
Answer: Ocuparon el Ruhr porque Alemania no se pudo hacer cargo a los gastos de guerra que le debía a Francia y esta no podía hacer cargo a la deuda con Estados Unidos.