Detail of "David" is a masterpiece of Renaissance sculpture created between 1501 and by the Italian artist Michelangelo. It is a marble statue of a standing male nude. The statue represents the Biblical hero David.
This design is an example of form, but more specifically, naturalistic form. Naturalistic is when the design is derived from anything in nature, or a human figure. This particular form is a human figure, which makes it a naturalistic form.