Final answer:
One category of forcible entry tools is prying, which includes tools like crowbars and halligan bars used to open obstructed doors or windows.
Step-by-step explanation:
Forcible entry tools are indeed grouped into several categories. One of these categories is prying. Prying tools are used by firefighters and rescue workers to open doors, windows, or other barriers that are locked, jammed, or otherwise obstructed. They achieve this by applying leverage to move the obstacle out of the way. Examples of prying tools include crowbars, halligan bars, and pry axes. Such tools are indispensable during rescue operations where time is of the essence and access to victims is impeded by barriers.