The transfer of energy that occurs when molecules bump into each other is called convection.
What is heat transfer?
The term "heat transfer" refers to the movement of heat. The flow of heat across a system's boundary is due to a temperature differential between the system and its surroundings.
Convection is the term for the energy transfer that takes place when molecules collide.
Hence convection is the correct answer.
To learn more about heat transfer refer to the link;
https://brainly.com/question/13433948
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