Answer:
The answer is C. "The amount of energy transferred between 2 groups of molecules at different temperatures."
Step-by-step explanation:
Heat is defined as the amount of energy transferred between substances, measured in Joules (J). In addition, heat always travels from a high temperature to a low temperature. Therefore, C is the correct answer since it best describes the definition of heat by stating that it is the amount of energy transferred between 2 groups of molecules at different temperatures.