The object with the least thermal energy will be 2kg brick 25 [tex]^oC[/tex].
The thermal energy is the property of a system. It is the energy that a system possesses with respect to its temperatures. The more of this energy that a system possesses, the more its temperature - and vice versa.
The thermal energy of a body depends on two variables:
Higher temperature means higher thermal energy. Also, two bodies at the same temperature may not have the same thermal energy if their mass varies. The higher the mass, the higher the thermal energy.
Thus, applying the explanation above, the object with the least thermal energy from the options would be 2 kg brick at 20 degrees centigrade.
More on thermal energy can be found here: https://brainly.com/question/11278589
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