which form of energy is directly related to the measure of the average kinetic energy of the particles in a…

Brief Explanations:

Thermal energy is defined as the total kinetic energy of all particles in a substance, and temperature (a measure tied to thermal energy) specifically quantifies the average kinetic energy of these particles. Potential energy is stored energy based on position/configuration, mechanical energy is the sum of kinetic and potential energy of a system, and electromagnetic energy relates to electric and magnetic fields, none of which directly measure average particle kinetic energy.

Answer:

A. Thermal energy