How does the No3 confirm cabin secure?

The correct response emphasizes the procedural aspect of cabin security, particularly the significance of crew members promptly taking their assigned seats as a key step in ensuring the safety and security of the cabin. When cabin crew members take their seats, they are preparing for the crucial phases of the flight, such as taxiing, takeoff, and landing, which are critical times when the cabin needs to be secure.

Taking their seats allows the crew to be positioned to effectively manage any potential in-flight emergencies, assist passengers as needed, and maintain overall order and safety. This action signifies that the crew is ready and alert, underscoring the importance of personal readiness in overseeing the well-being of everyone onboard.

Other options, while relevant to cabin safety, do not represent the specific action that indicates a confirmation of cabin security in the same direct and procedural manner. Checking emergency exits, for instance, is a part of broader safety checks but does not directly signal the readiness of the crew in the context of securing the cabin for takeoff or landing.