Air fills an automobile tire at a certain pressure that is greater than atmospheric pressure. as explained by the kinetic theory, what causes this pressure?

billions of gas particles colliding with the inner walls of the tire.

Explanation:

The kinetic theory assumes that gas particles are simultaneously colliding with one another and with the walls of their container, in this case the inner walls of a tire. The force of these collisions per unit of the walk is measured as gas pressure.