Which preflight action is necessary to mitigate potential hazards during a flight?

Checking the weather conditions and NOTAMs is crucial preflight action to mitigate potential hazards during a flight. Weather conditions can significantly impact flight safety, including factors like visibility, turbulence, wind speed, and the presence of storms. Additionally, NOTAMs (Notices to Airmen) provide essential information about temporary flight restrictions, airport conditions, and airspace changes that could affect the planned route or runway use.

By assessing weather and NOTAMs, pilots can make informed decisions about their flight, such as altering the route, delaying departure, or even choosing not to fly if the conditions are unsafe. This preflight step is vital for ensuring not only the safety of the flight but also the safety of all those involved, including other air traffic. Such diligence in monitoring weather and NOTAMs significantly reduces risks associated with unforeseen hazards during flight.