What is one difference between senators and representatives?

Question

Members of the House represent entire states, while senators represent districts.
Senators serve two-year terms, while representatives serve six-year terms.
Senators must be US citizens, while representatives do not have to be.
Members of the House represent districts, while senators represent entire states.

Answer 1

Senators must be at least 30 years old, while representatives must be at least 25 years old.