Who ensures the backside of CA-2 is completed?

The supervisor is responsible for ensuring that the backside of CA-2, which is a form used to report a worker's injury in the context of forest service and wildland fire incidents, is completed properly. This form is critical for documenting injuries, worker's compensation claims, and ensuring that the necessary follow-up actions are taken regarding medical treatment and reporting.

In this context, the supervisor plays a key role in overseeing the completion of important paperwork and ensuring compliance with safety and injury reporting protocols. This responsibility includes making sure that all relevant sections of the CA-2 form are filled out accurately and that any necessary follow-up procedures are initiated to support the injured employee.

The other options focus on individuals or groups who may be involved in the process, but they do not hold the primary responsibility for ensuring the completion of the form. For instance, while an injured individual may provide necessary information, they may not know the complete requirements for the documentation. Similarly, a Compensation for injury specialist would be more involved in processing the claim rather than completing the form itself, and the Home Unit may not have direct influence over the specific incident's paperwork management. Therefore, the supervisor is the correct answer as they are directly responsible for ensuring that the necessary documentation is completed.