Which of the seven principles of the Constitution is best illustrated by the following from Article 1 of the U. S. Constitution: The Legislative Branch- "Laws can only be passed by Congress and the law then needs the approval of the president; if the president vetoes, Congress can vote again to pass the law with a 2/3 majority vote.

A. Republicanism
B. Federalism
C. Checks and Balances

C. Checks and Balances

Explanation:

This is one of the best examples of how the principles of separation of powers and checks and balances were incorporated into the US Constitution. Who makes and passes law? It is Congress, nobody else can pass laws. It isn´t the President nor the Supreme Court. This is separation of powers. At the same time, the Constitution gives the President the right to veto a legislation piece he doesn´t like or agree with for some reason. But at the same time, it gives Congress the right to reject the presidential veto and promulgate the law with a vote of two-thirds of its members. Here we have a perfect and categoric example of  checks and balances.

c 3 branches because idk why they had 3 well when:

you think of it there are still contrys with 3