Final answer:
Electrons that drop back to their original energy level release energy in the form of light.
Step-by-step explanation:
When electrons gain enough energy to jump to a higher energy level, they can drop back to their original level by C. releasing energy in the form of light. This process is known as emission. It occurs when the electrons in an excited state return to the ground state, releasing the absorbed energy in the form of photons. Different atoms have different electron arrangements, resulting in light of different colors being emitted.