What does "Demo" refer to in the context of flights?

In the context of flights, "Demo" refers to safety announcements performed by flight attendants. This demonstration is crucial as it ensures that all passengers are aware of the safety protocols and procedures they need to follow in the event of an emergency. During this demonstration, flight attendants typically showcase how to use safety equipment, such as seat belts and oxygen masks, and explain emergency exit routes. By providing this information, flight attendants help to promote passenger safety and preparedness, which is a fundamental aspect of their role.

The other options, while related to the general operations and procedures of a flight, do not accurately reflect the specific meaning of "Demo." For instance, inflight entertainment demonstrations are not standard practice, emergency procedures training occurs before the flight or in training environments, and passenger boarding procedures are related to the process of getting passengers onto the aircraft, rather than safety demonstrations.