Which of the following processes requires a physical medium (a solid, liquid, or gas) to transfer thermal energy from one object to another? i. conduction ii. convection iii. radiation a. i and iii only b. i and ii only c. iii only d. ii only e. none of these require a physical medium to transfer thermal energy.

Conduction and convection require a physical medium (a solid, liquid, or

gas) to transfer thermal energy from one object to another.

Conduction is the process of heat transfer that takes place in solids.

Thermal energy is usually transferred from hotter surfaces to colder ones in

order to ensure equilibrium is reached

Convection is also similar to conduction but involves heat transfer in fluids

such as water. Radiation on the other hand doesn't require a physical

medium as it exists through a vacuum. This makes option B the most

appropriate choice.

Read more about heat transfer on link

i think its d if wrong im sorry