What must be done after completing a handoff before an aircraft enters the receiving controller's area of jurisdiction?

The transfer of radio communication is essential after completing a handoff because it ensures that the aircraft is under the jurisdiction of the receiving controller. This process involves the pilot switching their communication from the current controller to the new one, allowing for direct communication. This direct line of communication is vital for the safety and efficiency of air traffic management, as it enables the receiving controller to provide further instructions, updates, and necessary traffic advisories to the pilot once they enter that controller’s airspace.

Upon transferring radio communication, the new controller can then manage the aircraft effectively, ensuring that they adhere to air traffic control directives. This step is pivotal as it prevents any lapse in communication that could lead to safety issues. Other options, such as completing a position report or filing a flight plan, while important aspects of air traffic operations, do not directly ensure that the aircraft is safely transitioned to the new controller's airspace. Confirming altitude assignment is also critical, but it typically occurs after communication has been established. Thus, the transfer of radio communication serves as the crucial final step in the handoff process.