The diagram best represents heat transfer mainly by the process of conduction is (3).
Conduction is a mode of heat transfer in which the particles in a substance receive energy and vibrate at a higher energy. This energy is spread throughout the material without the atoms leaving their mean position.
In the diagram, conduction occurs in process (3) as atoms vibrate in the metal. The diagram best represents heat transfer mainly by the process of conduction is (3).
Learn more: https://brainly.com/question/22824409
