Which of the following tools is commonly used to enlarge an opening during vehicle rescue?

The rescue saw is commonly utilized in vehicle rescue operations to enlarge openings due to its effectiveness in cutting through various materials found in vehicles, such as metal, plastic, and glass. Equipped with specialized blades, the rescue saw can make precise cuts, allowing rescuers to create larger access points to reach victims trapped inside vehicles or to perform extrication more efficiently.

While other tools listed can assist in rescue operations, they serve different primary functions. The pry bar is mainly used for prying apart materials, which may not effectively create large openings. The hydraulic cutter is designed to cut through metal and is more suitable for removing vehicle components than for enlarging openings. Axes, while capable of cutting, may not provide the precision or efficiency needed for this specific task. Hence, the rescue saw stands out for its specialized purpose in enlarging openings during rescue efforts.