Question

which sentence states a fact? thermodynamics, which is the study of heat and other forms of energy, is the most interesting topic in the field of physics. heat always transfers from an object of higher temperature to an object of lower temperature.

Explanation:

A fact is a statement that can be proven true. The first sentence includes the opinion "most interesting", making it subjective. The second sentence about heat transfer is a proven principle in physics (the second law of thermodynamics), so it states a fact.

Answer:

Heat always transfers from an object of higher temperature to an object of lower temperature.