Which of the following is a primary responsibility of ABAs during an evacuation?

During an evacuation, the primary responsibility of ABAs (Additional Crew Members) is to assist customers at the bottom of the slide. This task is crucial as it ensures that passengers evacuate the aircraft safely and efficiently. ABAs are trained to provide guidance and support to passengers as they exit, helping to maintain order and prevent panic during what can be a chaotic situation. By assisting customers as they slide down the evacuation chute, they aid in ensuring that everyone gets off the aircraft quickly and safely, thereby contributing to the overall effectiveness of the emergency evacuation process.

The other options, while they may involve responsibilities related to air travel, do not pertain specifically to the role of ABAs during an evacuation scenario. Directing traffic at the airport and handling all onboard announcements do not fall under the specific duties of ABAs in an emergency, and securing the passenger cabin for landing is not applicable during an evacuation. Therefore, assisting customers at the bottom of the slide is the most relevant and critical task performed by ABAs during an evacuation.