The most accurate explanation among the options provided is:
The added energy is absorbed by the electrons in the atom. This causes the electrons to move to higher energy levels where they are unstable. As the electrons return to their original energy level, the absorbed energy is released in the form of a photon of light.
When energy is added to an atom, such as through heat or electricity, the electrons in the atom can absorb this energy and move to higher energy levels. However, these higher energy levels are unstable, and the electrons cannot remain in them for long. They quickly return to their original energy levels, releasing the absorbed energy in the form of a photon of light. This process is known as emission of light or luminescence.