Which of the following is a responsibility of Congress?

Making federal laws is a fundamental responsibility of Congress, which is outlined in the Constitution. The legislative branch, composed of the House of Representatives and the Senate, is specifically tasked with the power to create, debate, and pass legislation that affects the entire country. This process involves drafting bills, holding committee hearings, and voting on proposals before they can be signed into law by the President.

In contrast, appointing Supreme Court Justices is a power reserved for the President, with the advice and consent of the Senate. Managing the Armed Forces falls primarily under the purview of the President as the Commander-in-Chief, although Congress retains the power to declare war and allocate funding for military operations. Signing treaties is also a responsibility of the President, who negotiates and signs treaties but requires the Senate's approval to finalize them. Therefore, making federal laws is the role that distinctly identifies the primary responsibility of Congress.