When the temperature of a gas is increased, the kinetic energy
of molecules

Increases

When the temperature of a gas is increased, the kinetic energy

of molecules increases

Explanation:

According to the kinetic theory of gases, gases possess particles that are in continual random motion. Thus, the increase in temperature of gases will increase the kinetic energy of each particle meant for traveling in space, and then their collision with the walls of the containing vessel.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.