In figure 1 of the illustration, fire would spread to compartment "B" by __________. Illustration SF-0013

Correct Answer: Option D — conduction

Conduction is the transfer of heat through solid materials. In the provided illustration SF-0013, heat travels through the steel bulkhead from compartment A to compartment B. This direct thermal transmission through structural steel is a primary mechanism for fire spread in shipboard environments, requiring proper insulation.