Which of the following describes a direct flight?

The concept of a direct flight primarily refers to a flight that travels from a specified origin to a designated destination without terminating at any intermediate point for passengers to disembark. Therefore, the correct description of a direct flight is one that is a nonstop flight from the origin to the destination.

While other choices may describe various types of flights, they do not accurately capture what a direct flight entails. For example, a flight with multiple final destinations indicates a more complex itinerary than a direct flight, and one that makes intermediate stops clearly doesn't meet the criteria for being direct, as it allows for passenger changes during transit. Lastly, a flight solely for cargo transport is not relevant to the definition of direct flights for passenger travel purposes. Thus, the correct answer pertains directly to the nature and characteristics of a nonstop flight, aligning with the understanding of what constitutes a direct flight.