What is a layover in the context of air travel?

A layover in the context of air travel refers to a period of time between connecting flights where a passenger waits at an airport before continuing to their final destination. This often involves disembarking from one flight and possibly changing to another.

In this case, option B is appropriate because it captures the essence of a layover, indicating that the passenger might be staying at a hotel if the layover is extended or overnight. A layover can vary in duration, from just a couple of hours to a full day or more, but it typically allows travelers to rest or explore the city if the duration is long enough.

The other options do not accurately describe a layover. Time spent boarding the aircraft refers to the process before departure, while time spent in air traffic control relates to the management of air traffic rather than a passenger experience. Lastly, time spent preparing for takeoff also does not align with the concept of a layover, as it pertains to the final preparations of a flight prior to its departure.