What is a true statement regarding automatic sprinkler systems?

Automatic sprinkler systems are designed to activate in response to the heat generated by a fire. They operate on the principle that they will respond when the temperature reaches a certain threshold, typically based on the specific heat-sensitive elements in the sprinkler heads. This means they are set to react to conditions indicative of a fire, not at random intervals, nor do they require manual intervention to function.

The correct choice pertains to the system's functionality being dependent on detecting heat, often established by a temperature rating assigned to the specific sprinkler head installed. This temperature rating determines when the sprinkler will activate, which ties closely to the design and safety protocols for fire suppression. Understanding that sprinkler systems are designed to trigger automatically at predetermined temperature levels helps establish the reliability and efficiency of these life-saving systems in fire incidents.