Which of the following fire apparatus would be an example of a special service fire apparatus?

A rescue truck is considered a special service fire apparatus due to its specific functionality designed to handle unique emergency situations that may not be covered by standard fire engines or aerial trucks. Rescue trucks are equipped with specialized tools and equipment for technical rescue operations, such as extrication from vehicles, swift water rescue, and other specialized emergencies.

In contrast, a water tender primarily focuses on transporting large volumes of water to areas lacking hydrants, while an aerial ladder truck is designed primarily for fire suppression and rescue at height. A fire engine serves as the standard apparatus for firefighting, equipped with hoses, pumps, and basic firefighting tools. Therefore, the rescue truck stands out as a specialized apparatus meant for operations that extend beyond conventional fire suppression and rescue methods.