Answer: The correct answer is "the laws of thermodynamics".
Step-by-step explanation:
When two bodies having unequal temperature are placed in contact, heat transfers from the body having higher temperature to the one having lower temperature till the two bodies attain thermal equilibrium. Suppose, body A and B are in thermal equilibrium with body C, the body A and B would be in thermal equilibrium with each other.
There is no heat transfer between the two systems when they are at the same temperature.
Therefore, the movement of thermal energy is controlled by the laws of thermodynamics.
