Which statement is true regarding the function of automatic sprinkler systems?

The function of automatic sprinkler systems is designed to activate when a fire is detected, delivering water to suppress the flames effectively. When a fire occurs, the heat causes a heat-sensitive element in the sprinkler head to break, allowing water to flow out and target the affected area. This activation occurs quickly, often minutes before fire department personnel can respond.

It's important to note that the operation of these systems does not extinguish fires "immediately" in the sense that they eliminate the fire entirely upon detection. Instead, they are engineered to significantly reduce the fire's intensity and spread, which can be crucial in preventing further damage and enabling safe escape for occupants.

The other options do not accurately reflect the capabilities or intended use of automatic sprinkler systems. They are not limited to commercial use; they are also commonly found in residential buildings. These systems are automatic and do not require manual intervention to activate, as their purpose is to respond independently to fire conditions. Lastly, while they operate autonomously, effective use typically requires some level of oversight or maintenance to ensure they function properly when needed.