Which function is provided by passive fire protection systems like firestopping?

Passive fire protection systems, such as firestopping, are designed to prevent the spread of fire and smoke within a building without the need for active intervention. These systems serve as barriers that compartmentalize areas, thereby limiting the movement of fire and smoke from one space to another. Firestopping materials seal gaps and penetrations in fire-rated walls, floors, and ceilings, which could otherwise allow fire and smoke to travel swiftly through a building.

This method is fundamentally different from active fire protection systems, which rely on mechanisms like fire alarms and sprinklers that require activation during a fire. By contrast, the effectiveness of passive fire protection systems is inherent in their installation and design; they continuously work to provide safety as long as they are maintained properly.

In this context, the other options do not align with the purpose of passive fire protection. Automated fire suppression systems actively combat fires, while active fire monitoring involves detection and alerting systems. Training of building occupants is essential for preparedness and response but does not fall under the physical protective measures that passive fire protection systems provide. Thus, the function of passive fire protection in preventing fire spread without intervention is accurately captured in the correct answer.