What does a smoke alarm typically do when smoke is detected?

A smoke alarm is designed primarily to enhance safety by detecting the presence of smoke and sounding an alarm to alert the occupants of a building. This immediate response helps ensure that individuals are made aware of potential fire hazards in their environment, allowing them to take appropriate action, such as evacuating the premises or initiating further safety measures.

While smoke alarms may be part of a larger fire safety system that can work alongside sprinklers or alarms connected to emergency services, their primary function remains the detection of smoke and warning occupants. This focus on immediate alertness is crucial because it provides the critical time needed for people to respond effectively in an emergency situation. The other options do not represent the fundamental role of a smoke alarm; rather, they pertain to different systems or responses that are not directly part of the smoke alarm's designed purpose.