What instruction is given to a pilot to abandon an approach to landing?

The instruction given to a pilot to abandon an approach to landing is "Go around." This command is specifically used in aviation to direct pilots to discontinue their current approach due to various reasons such as unsafe landing conditions, an obstruction on the runway, or an unstable approach. When a pilot receives a "Go around" directive, they typically increase power, climb to a safe altitude, and enter a traffic pattern for another approach.

This term is widely understood and recognized within aviation regulations and standard operating procedures, making it the most appropriate and clear instruction for abandoning an approach. The other options you might encounter, such as "Hold position" or "Land immediately," convey different instructions and do not adequately address the need for the pilot to disengage from the landing attempt. "Circle back" is also not a standard term used in this context and could lead to ambiguity. Therefore, "Go around" effectively communicates the necessary action to ensure safety and compliance with proper landing procedures.