Objects possess internal energy due to the constant, random motion of their molecules and atoms, which is influenced by electromagnetic forces. Even neutral atoms exhibit net electromagnetic forces because they contain internal charges that affect their interactions, especially at distances comparable to their sizes. The Pauli exclusion principle plays a role in maintaining the structure of electron shells, preventing them from overlapping excessively. This internal energy is a manifestation of the conservation of energy, as absolute zero, where all motion ceases, is unattainable. Ultimately, the motion of these particles can be viewed as a remnant of the energy from the universe's inception.