Which of the following ICAO codes represents Nashville airport?

The ICAO code that represents Nashville airport is indeed KBNA. ICAO codes are four-letter alphanumeric codes assigned to airports around the world, and they follow a specific structure where the first letter typically indicates the region or country.

In the case of Nashville, the "B" in the KBNA code indicates that it is located in the United States, as U.S. airports typically start with a "K." The "NA" that follows specifies that it is Nashville airport. Importantly, KBNA is well recognized in both aviation and air traffic control contexts, thus solidifying its association with Nashville International Airport.

The other options provided do not correspond to Nashville airport. For instance, KMCO is the ICAO code for Orlando International Airport, KHEZ is an airport with a different designation, and KEWR pertains to Newark Liberty International Airport. Each of these has its own unique ICAO code, further emphasizing the importance of the specific codes in identifying airports accurately.