🔍 Key Concepts

• Fire triangle concept from basic firefighting theory • Role of oxygen in sustaining combustion • Difference between fuel (something that burns) and the byproducts like flames or gases

💭 Think About

• Which three things must be present before a fire can start and continue to burn, not what appears after it is already burning? • Which of these options includes something that is always available in normal air? • Look for the answer that names a general type of material that can burn, rather than a specific fuel used on ships.

✅ Before You Answer

• Make sure your three elements match the standard fire triangle taught in basic safety and STCW courses. • Check whether nitrogen supports combustion or actually tends to inhibit it. • Confirm that flames are a result of fire, not a requirement to start one.