The term 'enplane' refers to which of the following actions?

The term 'enplane' specifically refers to the action of passengers boarding the aircraft. This term is commonly used in aviation terminology to describe the process of individuals entering the aircraft in preparation for flight. Understanding this term is essential for flight attendants, as it relates to the various procedures and responsibilities they manage during the boarding process, ensuring that all passengers are safely and efficiently seated before takeoff. The other options pertain to different aspects of air travel; however, 'enplane' is distinctly associated with the boarding action.