Concept:Temperature is closely linked to the random motion of the molecules of a body.
Explanation:The kinetic theory states that the average kinetic energy of the molecules is directly proportional to the absolute temperature.
That is,
T∝KE, where
KE is the average translational kinetic energy of the molecules.
When the temperature of a body increases, its molecules move faster on average, so their average kinetic energy also increases.
Temperature is not determined by the total kinetic energy of all the molecules, nor simply by their average or maximum speeds.
It is the average kinetic energy per molecule that matches the temperature of the body.
Answer:B. average kinetic energy of its molecules.