Question

what is shared by both chambers of congress?
length of terms
number of members
unlimited terms

Explanation:

In the United States Congress, both the Senate and the House of Representatives have members who can serve unlimited terms. Senators have 6 - year terms and Representatives have 2 - year terms (so length of terms is not the same). The number of Senators is 100 (2 per state) and the number of Representatives is based on population (currently 435), so number of members is different. But there is no limit on how many terms a member can serve in either chamber.

Answer:

unlimited terms