Fusible link fire dampers are operated by __________.

Correct Answer: Option C — the heat of a fire melting the link

Fusible links are heat-sensitive devices designed to melt at a specific temperature, typically around 160°F. When the link melts, it releases a spring-loaded mechanism that automatically closes the fire damper, effectively isolating the ventilation duct and preventing the spread of fire and smoke through the ship's structure.