What might firefighters use reciprocating saws for besides cutting metal?

Firefighters might use reciprocating saws to access confined spaces because these saws are highly effective at cutting through various materials, making it easier to penetrate walls, floors, or other barriers that may be present in a confined space situation. This capability is crucial in rescue operations, where swift and effective access can mean the difference between life and death. Reciprocating saws can cut through wood, drywall, and other materials that firefighters might encounter while attempting to reach and assist individuals trapped in limited areas.

The other options, while plausible uses of different types of equipment, do not capture the unique advantage of a reciprocating saw in accessing confined spaces as effectively as option C does. For instance, removing fire debris and ventilation purposes typically involve other specialized tools and techniques that may not demonstrate the specific advantages of using a reciprocating saw in tight or challenging conditions.