Which of the following belongs in the last box

House of Representatives, CONGRESS, ????

A.Cabinet
B.President
C.Senate
D.Supreme Court

C??

To determine which of the options belongs in the last box, we need to understand the hierarchy and structure of the U.S. government. The U.S. Congress is made up of two chambers: the House of Representatives and the Senate. So, the House of Representatives and the Senate are both part of Congress, not separate from it. Therefore, the correct answer for the last box would be "C. Senate."