What is the ICAO code for Abilene VORTAC in Texas?

The ICAO code for Abilene VORTAC is indeed ABI. This code is derived from the location's name, as is common with many VOR and VORTAC facilities, where the first three letters often represent the airport or navigation point associated with the VOR.

In the case of ABI, it corresponds to Abilene, Texas, where this VORTAC is located. The other options provided do not correspond to VORTACs or airports in the Abilene area. KABQ represents Albuquerque, New Mexico; KAMA is the ICAO code for Amarillo, Texas; and KADW is the ICAO code for Andrews Air Force Base in Maryland. Understanding the structure of ICAO codes helps to identify and remember the associated locations more easily, reinforcing the concept of geographical and operational significance in air navigation.