What must all flight attendants do prior to every takeoff and landing?

The correct answer emphasizes the critical safety protocols that flight attendants must engage in before each takeoff and landing. Assuming the brace position serves as a reminder for flight attendants about their safety responsibilities during turbulent phases of the flight. It also highlights the importance of conducting a 30-second review, which allows crew members to mentally prepare for any emergency procedures or scenarios that could occur during takeoff and landing.

This practice is vital as it helps flight attendants remain alert and focused, ensuring they are prepared to manage any potential passenger needs or emergencies. The 30-second review includes recalling emergency exits, potential evacuation routes, and any specific procedures related to the aircraft type, enhancing overall safety for both crew and passengers.

The other options involve important aspects of flight operations, such as ensuring passenger safety and preparing for service, but the brace position and review specifically address immediate readiness for the unique challenges associated with takeoff and landing.