I'm a real "powerhouse".that's plain to see.i break down food to release energy

answer; ///i do believe the answer is (virus);

a. as the temperature increases, the kinetic energy of the gas molecules increases & the molecules move faster & further away from each other.

b. if you decrease the temperature of a fixed amount of gas at constant pressure, the combined gas law reduces to charles's law. in this case, volume will also decrease.