Which of the following is a branch of government?

Congress is a branch of government because it is part of the legislative branch in the United States system of government. The legislative branch is primarily responsible for making laws, and Congress is composed of two houses: the House of Representatives and the Senate. This framework is established by the U.S. Constitution, specifically in Article I, which outlines the structure and powers of the legislative branch.

The other choices refer to different aspects of government organization or institutions but are not standalone branches. The Cabinet consists of the heads of the executive departments and serves as an advisory group to the President, functioning within the executive branch. The Judiciary Committee is a part of Congress that oversees the judicial system but does not constitute a separate branch of government itself. The Federal Reserve is the central banking system of the United States, focused on monetary policy and financial regulation, but it is not classified as a branch of government. Therefore, Congress is correctly identified as the branch of government among the given options.