What is a primary responsibility of No.2 during the safety demonstration?

The primary responsibility of No.2 during the safety demonstration is to perform cabin secure checks at rows 21-33. This task is essential during the safety demonstration as it ensures that the cabin is secure for takeoff. The No.2 crew member plays a crucial role in checking that all passengers are seated with their seatbelts fastened and that there are no loose items that could become hazards during the flight. By focusing on specific rows, the No.2 can ensure a thorough safety check, contributing to the overall safety and preparedness of the flight.

The other options involve responsibilities that either do not align directly with the primary safety demonstration duties or pertain to tasks assigned to different crew members. For example, checking the rear galley might be relevant at other times, but it's not a priority during the demonstration. Confirming the cabin door is secure is also important, but it's typically a responsibility aligned with the No.1 or the lead crew member. Handing out life jackets can be done at other stages in the flight operation but isn't the primary responsibility during the safety demonstration itself. Therefore, the focus on checking rows 21-33 during the safety demonstration showcases the importance of safety protocol and passenger readiness.