Final answer:
A. The object at a higher temperature has more thermal energy because thermal energy is tied to the average kinetic energy of particles, which is greater in the hotter object.
Step-by-step explanation:
The object with more thermal energy when two objects have the same mass but different temperatures is the object at the higher temperature. Thermal energy is the kinetic energy associated with the random motion of atoms and molecules. An object at a higher temperature has a higher average kinetic energy, and therefore, has more thermal energy. Heat is the transfer of thermal energy due to a temperature difference and it moves from the hotter object to the cooler one until thermal equilibrium is reached.
Therefore, the correct answer to the question is: A) The object at a higher temperature.
When two bodies of different temperatures are brought into contact, the overall direction of heat transfer is always from the higher-temperature object to the lower-temperature object until they are in thermal equilibrium, meaning they have reached the same temperature. No heat is exchanged once thermal equilibrium is achieved.
In summary: