What must be taken in ditching seats 10 and 11?

In the context of ditching, specifically regarding seats 10 and 11, life preservers are essential safety equipment that must be taken. This requirement is in place due to the immediate threat of water landings and the necessity for passengers to be safely buoyed in the water. Life preservers help ensure survival until rescue can be effected.

Having life preservers accessible to those seated in these locations enhances the chances of passenger safety during an emergency situation. While other items, like first aid kits, fire extinguishers, and rescue beacons, serve important functions in various emergencies, they don't directly address the particular needs and risks associated with ditching scenarios. In such events, immediate flotation assistance is critical, underscoring the function and importance of life preservers as the correct answer in this situation.