What systems work in conjunction with the CACS to provide emergency oxygen?

The correct response highlights the role of emergency oxygen systems and passenger masks as critical components that collaborate with the Cabin Atmosphere Control System (CACS) during emergencies. The CACS is responsible for maintaining a safe and comfortable environment in the cabin, managing air quality and temperature. However, in situations where cabin pressure drops or there is a need for supplemental oxygen—such as in the event of a loss of cabin pressure—emergency oxygen systems are activated.

These systems include oxygen masks that automatically deploy for passengers, ensuring that individuals have access to breathable air when needed. The integration of these systems is vital for passenger safety, as they provide the necessary support to maintain consciousness and prevent hypoxia until the situation is resolved.

While other options mention systems relevant to airplane safety, they do not directly correlate with the provision of emergency oxygen, which is the primary focus of the question. This understanding of the collaboration between emergency oxygen systems and the CACS can enhance awareness of safety measures aboard an aircraft.