A person near a campfire may feel warmth from the fire even though the heated...

Heat transfer: Heat from the campfire can reach a person through radiation, conduction, and convection. In this scenario, radiation is the primary mode of heat transfer.

Infrared radiation: The warmth felt by a person near a campfire is primarily due to infrared radiation. Infrared radiation is a type of electromagnetic wave that carries heat energy.

Conclusion: Infrared radiation is the part of the electromagnetic spectrum that transfers most of the energy warming a person near a campfire.

References: Textbooks on heat transfer mechanisms, properties of infrared radiation, Integrated Physical Sciences materials on electromagnetic spectrum.