Final answer:
A story of a building that is beneath the ground level is referred to as a basement, different from an attic, penthouse, or mezzanine which are situated at higher levels of the structure.
Step-by-step explanation:
A story of a building that is wholly or partly below ground level is known as a basement. This term distinguishes it from other parts of a house or building, such as the attic, which is at the top under the roof; the penthouse, which is an apartment or set of rooms situated on the top floor; and the mezzanine, which is an intermediate floor, particularly between the ground floor and the floor above. The basement is often used for several purposes including storage, additional living space, or even as a separate apartment.