Which definition best describes a Fire Alarm System?

A Fire Alarm System is accurately defined as a collection of components that monitors fire alarm signals. This system serves the crucial function of detecting and signaling the presence of a fire through various elements such as smoke detectors, heat sensors, and manual pull stations. When these components detect an abnormal situation, they trigger alarms to alert occupants and emergency services, allowing for a timely response to potential fire hazards.

The focus on monitoring fire alarm signals highlights the system's primary purpose: ensuring safety by promptly identifying fire threats. This definition encapsulates the system's integral components and their roles in providing effective fire protection, thereby reinforcing the importance of comprehensive fire safety in buildings.

In contrast, the other choices outline systems that do not encompass the full spectrum or purpose of a Fire Alarm System, thereby underscoring why they do not convey the correct definition.