Which set correctly lists the three types of heat transfer?

• A. Conduction only
• B. Radiation, convection, conduction
• C. Convection only
• D. Radiation only

Answer: (B)

Heat moves in three ways: conduction, convection, and radiation. The set that lists all three—radiation, convection, conduction—is the correct one because it covers every common mechanism by which heat can travel. Conduction happens through direct contact and molecular interactions, convection through the movement of fluids or air, and radiation through energy transfer by electromagnetic waves. Options that name only one mode miss the other two, so they don’t fully describe how heat can transfer.