A smoke detector's function is to detect smoke and alert occupants and personnel to a potential fire, thereby facilitating prompt evacuation and intervention. This device serves as a primary fire prevention measure in guest rooms.
- A fire safety sign contributes to awareness but does not actively prevent fires.
- A water sprinkler system can control or extinguish fires, but its role is secondary to the smoke detector in terms of initial fire prevention within a guest room.
- A fire exit chart guides occupants during an evacuation but does not prevent the fire itself.
Consequently, the accurate response is Smoke detector.