Which of the following components is part of a fire protection system in buildings?

A fire protection system in buildings is designed to detect and respond to fires to minimize damage and ensure safety. Fire alarm systems are crucial components of such systems, as they are specifically intended to detect smoke and heat, alerting occupants to potential danger. These systems can be interconnected with other fire suppression mechanisms, ensuring an effective response to a fire incident.

In contrast, heating boilers provide climate control and do not play a role in fire protection. Water filtration units are focused on ensuring the quality of water supply rather than addressing fire prevention or response. Building management systems oversee various functionalities within the building, such as energy efficiency and operational controls, but do not specifically address fire safety and protection. This distinction highlights the reason why fire alarm systems are correctly identified as part of a fire protection system in buildings.