Which task is essential for flight attendants before the aircraft departs?

Conducting a pre-flight equipment check is essential for flight attendants before the aircraft departs because it ensures that all safety equipment is functional and readily accessible in the event of an emergency. Flight attendants are responsible for verifying that items such as oxygen masks, life vests, fire extinguishers, and first-aid kits are in their proper locations and well-stocked. This task is crucial for ensuring the safety of both the passengers and the crew, as it allows for prompt and effective responses to potential emergencies during the flight. The importance of this check cannot be overstated, as proper preparation significantly contributes to the overall safety protocols of the airline.