What is the role of sprinkler heads in a fire suppression system?

Sprinkler heads play a crucial role in a fire suppression system by controlling and extinguishing fires when activated by heat. Each sprinkler head is equipped with a heat-sensitive element that reacts to the temperature in the environment. When a fire ignites and the temperature rises to a predetermined threshold, the sprinkler head releases water in a spray pattern, effectively cooling the flames and reducing the fire's intensity. This system is designed to respond automatically, enabling rapid intervention which can significantly minimize property damage and increase the safety of occupants in the area.

The other options focus on unrelated functions such as distributing foam, enhancing visibility, or signaling alarms—roles that are not part of the primary function of sprinkler heads in fire suppression systems.