What is the term length for a United States Supreme Court Justice?

The term length for a United States Supreme Court Justice is indeed life. This means that once appointed, justices serve for life, unless they choose to resign, retire, or are removed through impeachment. The intention behind this lifetime appointment is to ensure that justices can make decisions based on the law and the Constitution without the pressure of political considerations or the fear of facing re-election.

This design promotes judicial independence, allowing justices to uphold the rule of law and make decisions that may not be politically popular but are consistent with their interpretation of the Constitution. The other options, suggesting fixed terms or conditions for service, do not align with the Constitution, which establishes the lifetime appointment concept.