Question

how conduction of heat occurs in a solid metal rod

Answer 1

Heat energy can move through a substance by conduction. Metals are good conductors of heat, but non-metals and gases are usually poor conductors of heat. Poor conductors of heat are called insulators. ... This kinetic energy is transferred from hot parts of the metal to cooler parts by the free electrons.

Answer 2

I think that is your answer is
because metals are good conductor of heat metals provide high temperature for meeting