Such transfer of heat is called Thermal conduction. It reffers to the process of transfer of heat that happens while there are collisions of mircroscopic particles (molecules, atoms and electrons) and electrons are movings within an object as it transfers disorganized kinetic and potential energy through it, hence producing heat.
It clarifies the relationship between Brutus and Mark Antony. It informs the audience about events that took place off stage. It provides background information about Brutus's relationship with Messala.