Which weather advisory provides information about significant weather events?

The Significant Meteorological Information (SIGMET) is the correct choice as it specifically provides information about significant weather events that can affect the safety of flight operations. SIGMETs are issued for severe weather phenomena such as thunderstorms, turbulence, icing, and volcanic ash, which could pose a threat to aircraft. They are designed to alert pilots and flight operations personnel to hazardous conditions that are often not covered by routine weather reports or forecasts.

In contrast, the Terminal Aerodrome Forecast (TAF) offers weather predictions for specific airports but does not focus on severe weather events in the broader airspace. The Aeronautical Information Manual (AIM) serves as a guide for pilots about aviation regulations, procedures, and safety, but does not provide real-time weather information. Weather Handling Advisory (WHA) is not a standard term used in aviation weather reporting and does not exist in the same context as the other options. This distinction makes SIGMET the definitive source for significant weather advisories critical for flight safety.