Question

according to kinetic molecular theory, what is temperature?
the number of times the particles collide with each other
the average kinetic energy of the particles
the number of times the particles collide with the container

Explanation:

Kinetic molecular theory states that temperature is a measure of the average kinetic energy of the particles in a substance. Collision frequency (with each other or the container) relates to pressure, not temperature.

Answer:

the average kinetic energy of the particles