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.
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.