Which device alerts people when there is smoke in the air?

• A. Smoke Detector
• B. Sunscreen
• C. Allergy
• D. Blood pressure

Answer: (A)

Detecting smoke early is a safety priority because it gives people time to react and evacuate. A smoke detector is a device that monitors the air for smoke particles and, when detected, sounds an alarm to alert occupants. This early warning is crucial for reducing injuries and saving lives during a fire. Some detectors respond to tiny smoke particles from fast-burning fires (ionization), while others sense larger particles from smoldering fires (photoelectric), and many modern units combine both methods. By contrast, sunscreen protects skin from the sun, an allergy is a medical condition, and blood pressure is a health measurement—none of these alert you to smoke in the air.