How many universal life vests are found in the aft stowage compartment?

The correct answer indicates that there are a total of 10 universal life vests located in the aft stowage compartment. This specific number aligns with the standard safety and emergency equipment requirements for Southwest Airlines, ensuring there are adequate resources available for all passengers on board in the event of an emergency water landing.

Universal life vests are critical safety devices designed to provide flotation assistance to individuals in water. Southwest Airlines, like many airlines, must adhere to regulations regarding safety equipment, which includes having a sufficient number of life vests to accommodate the aircraft's passenger capacity. This ensures that every passenger has access to a life vest, maximizing safety and compliance with aviation safety standards.

In contrast, the other options do not accurately reflect the number of life vests available, which means they do not meet regulatory guidelines or operational needs.