What is the carrier on which the passenger departs from the connecting point called?

The term used for the carrier on which the passenger departs from the connecting point is "Accepting/Receiving Carrier." This designation refers specifically to the airline that takes responsibility for transporting the passenger from that point onwards in their journey.

In a passenger's itinerary, multiple airlines may be involved, particularly in cases of connecting flights where a passenger transfers from one flight to another. The accepting or receiving carrier plays a critical role in this process, as they are responsible for the passenger's onward travel beyond the connecting point. This concept is essential in civil aviation for understanding ticketing, luggage transfer, and the responsibilities of different airlines in a multi-leg flight.

The other options presented are important concepts in aviation but don't pertain directly to the question. "Ancillary Services" refer to additional services or products offered by airlines beyond the basic flight, "Flight" simply refers to the journey itself, and "Itinerary" denotes the entire travel schedule, including all flights and connections, rather than focusing on the specific carrier at a connection point.