What phrase should you use when cleared for a full-stop landing?

When you are cleared for a full-stop landing, the appropriate phrase to use is "cleared to land." This phrase communicates to both the pilot and air traffic control that the aircraft has been granted permission to land at the designated runway. It signifies the end of the approach phase and the beginning of the landing phase, confirming that the runway is available and that the pilot can proceed safely to land.

The other options do not convey the same level of authorization. For instance, "landing gear down" might be a necessary action, but it does not inform control of your landing status. "Final approach" indicates you are on the final segment of the landing procedure but does not necessarily confirm you have received clearance. "Touchdown" describes the action of landing itself but comes after the clearance, so it is not appropriate to use when you are asking for or confirming permission to land. Thus, "cleared to land" is the correct phrase for this situation.