Which body of government is responsible for making federal laws?

The correct answer is Congress because Congress is the legislative branch of the federal government of the United States, and its primary function is to make laws. It consists of two chambers: the Senate and the House of Representatives. Both chambers must work together to pass legislation, but the term "Congress" encompasses the entire legislative body, including both the Senate and the House, which means it directly refers to the body responsible for the law-making process.

The Senate and the House of Representatives are components of Congress, and while they play specific roles, they do not operate independently in the law-making function. The Supreme Court, on the other hand, is part of the judicial branch and is tasked with interpreting laws rather than creating them. Thus, Congress is the correct answer as it encompasses the full scope of the legislative power in the federal government.