The temperature of a substance is a measure of the 1.
average kinetic energy of its particles
2.
average potential energy of its particles
3.
ionization energy of its particles
4.
activation energy of its particles

1.  average kinetic energy of its particles

Explanation:

The temperature of a substance is a measure of the average kinetic energy of its particles.

The average kinetic energy of the particles of a substance is directly proportional to its temperature. This is one of the premise of the kinetic theory of gases.

When thermal energy is supplied to a substance, the molecules gains kinetic energy. As the kinetic energy increases so also the temperature of the substance. So, we see that kinetic energy and temperature are connected through the thermal energy acquired by the substance.

Afraidsugar lol it’s the third one

; lc