Final answer:
AR 215-1 is the Army Regulation that covers Better Opportunities for Single Soldiers (BOSS), a program that enhances the quality of life for single soldiers.
Step-by-step explanation:
The Army Regulation (AR) that covers Better Opportunities for Single Soldiers (BOSS) is AR 215-1. BOSS is a program that aims to enhance the quality of life for single soldiers in the army. It provides a platform for single soldiers to voice their concerns, participate in community service, and engage in recreational activities. The program promotes camaraderie and personal development among soldiers.