Which of the following best describes an airport?

The best description of an airport is a location where aircraft take off and land, including buildings such as hangars and terminals. This definition encompasses the essential functions of an airport, which facilitate air travel and transportation. Airports are complex infrastructures that provide much more than just a runway; they include passenger terminals where travelers embark and disembark, as well as hangars for aircraft maintenance and storage.

In contrast, the other options do not capture the comprehensive nature of what an airport entails. A facility geared only towards the ground handling of cargo and baggage overlooks the vital roles played by terminals and runways in passenger travel and does not address the airport's function in accommodating aircraft. An area designated solely for parking aircraft ignores the takeoff and landing processes, essential to an airport's operation. Similarly, limiting the description to air traffic control operations does not reflect the broader responsibilities of an airport, which includes supporting services for both aircraft and passengers. Overall, option A provides a complete view of an airport’s functionality and infrastructure.