Which best describes the relationship between internal energy and thermal energy? thermal energy is a measure of the internal energy of a substance. internal energy is a measure of the thermal energy of a substance. internal energy is the portion of thermal energy that can be transferred. thermal energy is the portion of internal energy that can be transferred.

Internal energy includes all the energies which are inside the system.  It includes kinetic energy, potential energy, chemical energy, nuclear energy and as well as the thermal energy. So, thermal energy is the portion of the internal energy and since, the thermal energy can be transferred from one body to another.

Hence, the answer is "Thermal energy is the portion of internal energy that can be transferred."

the answer to this question is 60 n