Final answer:
The example of the 'Supreme Court declaring a law passed by Congress as unconstitutional' best demonstrates the concept of checks and balances, as it illustrates the judicial branch checking the legislative branch through judicial review.
Step-by-step explanation:
The concept of checks and balances in the U.S. government is designed to ensure that no single branch becomes too powerful.
Among the answer choices given, the one that serves as a good example of the checks and balances system enforced upon the legislative branch is: 'The Supreme Court declares a law passed by Congress as “unconstitutional” based on their interpretation of the Constitution.'
This example reflects the judicial branch's ability to check the legislative branch by using judicial review, a power that was established by the U.S. Supreme Court in the case of Marbury v. Madison in 1803.
For instance, the President using military force to influence Congress, Congress attempting to strip the President's veto power, or Congress removing Supreme Court judges purely for questioning the legality of laws, do not inherently align with the principles of checks and balances as outlined in the U.S. Constitution.