What checks are performed by No.4 during 'cabin secure'?

The correct answer involves understanding the specific responsibilities assigned to crew members during the 'cabin secure' checks. In this context, No.4 is tasked with ensuring the safety and security of the cabin by performing checks in designated areas.

In this case, performing checks at rows 1-10 ensures that the forward section of the cabin is secure, and it includes the front row seats where passengers are typically seated during takeoff and landing. Additionally, checking the forward toilet is crucial as it ensures that all areas of the cabin are clear and secure before the aircraft enters its critical phases of flight.

These responsibilities are vital for passenger safety and compliance with safety protocols. Conducting thorough checks in these areas helps identify any issues that may affect the safety and comfort of passengers during the flight. Thus, the answer accurately reflects the specific duties associated with the safety check process during the cabin secure phase.