Question

when an excited electron returns to a lower energy level, the energy emitted is
a continuous spectrum of electromagnetic waves
the same as the energy absorbed
always only visible light

Explanation:

When an electron is excited, it absorbs a specific amount of energy to jump to a higher - energy level. When it returns to a lower energy level, it emits the same amount of energy it absorbed. The emitted energy is in the form of discrete photons corresponding to specific wavelengths, not a continuous spectrum. Also, the emitted energy is not always visible light; it can be in other parts of the electromagnetic spectrum like ultraviolet or infrared.

Answer:

the same as the energy absorbed