Which is one branch of the U.S. government?

One branch of the U.S. government is Congress, which is composed of two houses: the Senate and the House of Representatives. This legislative branch is responsible for making laws, representing the interests of the citizens, and overseeing the functioning of the government. Each member of Congress plays a role in the democratic process by proposing, debating, and voting on legislation.

The other options refer to important entities within or related to the government but do not represent a branch themselves. The Federal Reserve is the central banking system of the U.S., responsible for monetary policy. The Supreme Court is the highest court in the judiciary branch, interpreting laws and their constitutionality. The President's Office, while essential for executing laws and leading the executive branch, does not stand as a separate branch of government. Therefore, Congress distinctly represents one of the three divisions of government, alongside the executive and judicial branches, each serving unique functions in upholding the democratic framework of the nation.