The spreading of fire as a result of heat being carried through a vessel's ventilation system is an example of heat transfer by __________.

Correct Answer: Option B — convection

Convection involves the transfer of heat through the movement of fluids or gases. Ventilation systems act as conduits for heated air, smoke, and toxic gases, allowing a fire to spread rapidly to distant compartments. Proper fire damper operation is essential to isolate these paths during an emergency.