Final answer:
The correct phrase outlining the PASS device's function is that it allows firefighters to trigger an alarm when in distress, serving as a personal safety signal for help during emergencies. The device is unrelated to the functionality of AEDs, which assist in cardiac emergencies.
Step-by-step explanation:
The phrase that describes the real use of the Personal Alert Safety System (PASS) device to firefighters is 'It also allows firefighters to trigger an alarm when in distress.' This sentence accurately outlines the primary function of the PASS device — to create an audible alert to signal when a firefighter is unable to move or needs immediate assistance. While the device does contribute to the overall safety and efficiency of a firefighting team, enabling communication or locating victims under rubble, which may be mentioned in other parts of the passage, is not its direct use. Instead, in hazardous situations such as being trapped or incapacitated, a firefighter can manual activate the PASS alarm, thereby sending a clear signal for help, which can be critical in high-risk rescue operations.
On the other hand, an Automated External Defibrillator (AED) is a portable device designed to treat individuals experiencing sudden cardiac arrest. It is capable of analyzing the heart's rhythm and, if necessary, delivering an electric shock, or defibrillation, to help the heart re-establish an effective rhythm. Found in many public places, AEDs provide verbal instructions and are engineered for ease of use, even by those who are not healthcare professionals.