Name one branch or part of the government.

The correct answer is Congress because it is one of the three branches of the United States government, specifically the legislative branch. Congress is responsible for making federal laws, and it consists of two chambers—the House of Representatives and the Senate. This branch plays a crucial role in representing the interests of the public, crafting legislation, and overseeing the executive branch.

The other options do not fit the criteria as well. The Federal Reserve is an independent central banking system in the U.S. that manages monetary policy but is not a branch of government. State governments, while important, represent the governance structures at the state level rather than a specific branch of the federal government. The United Nations is an international organization that facilitates cooperation among countries but does not constitute part of the U.S. government structure.