What is a taxiway?

A taxiway is defined as a paved area that connects the runway to various facilities, including terminals, hangars, and other operational areas within an airport. This infrastructure is essential for allowing aircraft to move safely and efficiently from runways, where takeoffs and landings occur, to the terminal for passenger boarding or parking.

Option B correctly identifies this functional significance; it clarifies the role of a taxiway in the airport's layout.

The other choices do not accurately depict a taxiway's function: the area for parking aircraft refers to a different specific zone known as a "ramp" or "apron"; the main hall of an airport is typically called the terminal and serves as the central hub for passenger activities; and the boarding areas are designated spaces in terminals where passengers embark on their flights, rather than the taxiway itself. Understanding the specific roles of these different components is essential for effective airport operation and safety protocols.