Answer:
c.the air in a hot air balloon is heated by a gas burner.
The air in a hot-air balloon is heated by a gas burner - this is an example of the transfer of thermal energy by conduction.
Thermal Energy is energy resulting from the motion of particles.
The process by which heat is transferred from the hotter end to the colder end of object is known as conduction. Thermal conduction is the diffusion of thermal energy (heat) within one material or between materials in contact.
In gases, conduction is due to the collisions and diffusion of molecules during their random motion. Photons in this context do not collide with one another, and so heat transport by electromagnetic radiation is conceptually distinct from heat conduction by microscopic diffusion and collisions of material particles and phonons. But the distinction is often not easily observed unless the material is semi-transparent.
The correct answer is option C.
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