Final answer:
The immediate supervisor is primarily responsible for correcting a Marine who deviates from group values, but responsibility also extends to the Unit commander, individual Marine, and the entire unit.
Step-by-step explanation:
When a Marine deviates from institutional or group values, it is primarily the responsibility of the immediate supervisor to address the situation and guide the individual back on track. However, the responsibility also lies with the Unit commander, individual Marine, and the entire unit to maintain and uphold the standards and values of the organization. Each level of command has a role to play in enforcing discipline and ensuring alignment with core values, creating a cohesive and accountable structure.