Final answer:
The Bureau of Prisons (BOP) oversees the supervision of offenders who leave Federal confinement early due to credit for good behavior. They provide custody, care, and oversight for released offenders, ensuring compliance with release conditions and facilitating successful reintegration into society.
Step-by-step explanation:
The agency that oversees the supervision of offenders who leave Federal confinement early due to credit for good behavior is the Bureau of Prisons (BOP). The BOP is responsible for the custody and care of federal offenders, and part of its role is to monitor and provide oversight for offenders who are released early under certain conditions. They ensure that these offenders comply with the terms of their release and receive appropriate support and resources to facilitate their successful reintegration into society.