How many ARFF units are listed along with a light/air unit?

The correct answer indicates that there are two ARFF (Aircraft Rescue and Firefighting) units listed along with one light/air unit. This aligns with standard operational practices for firefighting at airfields, where ARFF units are vital for responding to aircraft emergencies. Having two ARFF units ensures adequate coverage and manpower for effective emergency response while a light/air unit provides essential support for lighting and air supply, enhancing the overall capability of the response team. This configuration of two ARFF units allows for increased versatility and readiness in various emergency scenarios that may occur at an airfield.