Why does passing an electric current through the metal filament of a light bulb produce light? The explanation is that the electrical energy makes the electrons in some of the atoms of the filament metal jump outward to an orbit with a higher energy level.

This higher orbit is unstable, and after a while the electron will pop back into its original orbit; when it does this, it emits energy in the form of light.

Instructions:

Determine whether the following passages contain arguments, explanations, or descriptions.

Explain and justify your answer with reference to the meaning of each of these terms.