Which element of supply would you contact to turn in equipment?

The correct choice focuses on Equipment Accountability, which is key for managing the lifecycle of equipment. This element is responsible for handling equipment that is issued to personnel and ensuring that all items are accurately accounted for throughout their use. When it comes time to turn in equipment—whether because it's no longer needed, has been replaced, or is defective—Equipment Accountability is the designated entity to ensure that the equipment is properly documented and returned. This helps maintain accurate records for inventory control, auditing, and resource management within the overall supply system.

While other options might play roles in the broader supply chain, Equipment Accountability is specifically tasked with overseeing the details of equipment returns, including ensuring that all necessary paperwork is completed and that the items meet the conditions for return. Thus, contacting this element is crucial for a smooth and compliant equipment turnover process.