Which of the following is the correct way to indicate an Air Traffic Control Tower on the radio?

Indicating an Air Traffic Control Tower on the radio is done using the format that expresses both the facility type and its name in a concise manner. The correct option utilizes the phrase "Facility name tower," which is a standard communication practice. This format effectively conveys the specific type of the facility—indicating that it is a tower—followed by the name of that tower, ensuring clear identification.

When making radio transmissions, clarity and brevity are crucial, especially in high-traffic environments. Using this established format allows pilots and air traffic controllers to communicate effectively without ambiguity. It's important to note that the other options may not follow the prescribed format or might not align with standard communication practices, which is why they are less appropriate for indicating an Air Traffic Control Tower over the radio.