What are the two parts of the U.S. Congress?

Why this is the answer

Congress is split into two chambers, the Senate and the House of Representatives. Article I says so in its opening sentence, and a legislature built this way is called bicameral. Every bill has to pass both before it can go to the President. The split came out of a fight at the Constitutional Convention. Some delegates wanted each state's number of representatives to depend on how many people lived there; others wanted every state to have the same number, whatever its size. The settlement gave each side one chamber. The House has 435 voting members, divided among the states by population, who represent districts and serve two-year terms. The Senate has 100 members, two per state, who represent all the people of their state and serve six years. The two chambers also hold powers the other does not. Only the House can start a bill that requires Americans to pay taxes, and only the House can impeach; the Senate then tries the impeachment. Only the Senate can reject a treaty the President has signed or turn down the President's choice for the Supreme Court. Those differences are part of the system of checks and balances: each chamber can stop the other, and together they check the President. The titles describe the jobs, too: a senator answers to an entire state, while a representative answers to a single district. The answer on the list is "Senate and House," with "of Representatives" optional. Give both names. Saying only one is half an answer, because the question asks for two parts. Applicants also blur Congress with the whole government and answer "the House and the President" or "the Senate and the Supreme Court," which pairs one chamber with a different branch entirely. A quick way to hold it: the Senate is the smaller, longer-serving chamber with two seats per state, and the House is the larger one, where the number of seats follows population.