List the priority levels used by the Flight Warning System in order.

The Flight Warning System on the A320 utilizes a specific hierarchy of priority levels to efficiently convey critical information to the flight crew. This hierarchy is essential for identifying which alerts require immediate attention and action. The correct order begins with Level 3, which signifies a major malfunction that could lead to a hazardous situation; these warnings require immediate response from the pilots. Following that is Level 2, indicating a less urgent situation that still demands attention but allows for more time to address the issue. Lastly, Level 1 alerts are for informational notifications that do not require immediate action.

This prioritization ensures that flight crews can focus on the most critical issues first, enhancing safety and operational efficiency. Understanding these levels is crucial for pilots as they navigate through potentially stressful situations, allowing them to make informed decisions quickly. Other proposed sequences do not accurately reflect the operational priority established in the A320's Flight Warning System.