Final answer:
The ideal human form in Ancient Greek sculpture was achieved using a pose called contrapposto, where the figure stands asymmetrically with a lifelike appearance, reflecting movement and naturalism.
Step-by-step explanation:
For the ancient Greeks, the ideal human form was about more than just precise statistical measures; it was about bringing marble to life with the appearance of movement and realistic detail. The pose that enabled sculptors to give their figures a lifelike quality and the semblance of motion was known as contrapposto. This pose is characterized by an asymmetrical arrangement of the body where one part is turned in opposition to another, typically with weight shifted onto one leg, creating a more dynamic and naturalistic appearance. The sculpture that demonstrates this most famously might be the Diadumenos, by the Greek sculptor Polykleitos. His mastery of this technique set a standard for sculptural depiction throughout Western art history.
The Ancient Greeks pursued naturalism by crafting sculpture that displayed both physical and facial expressions full of pathos, or emotional impact. Such sculptures interacted with viewers and were a clear departure from the earlier, more rigid Archaic style. The development of contrapposto signaled a movement towards naturalism and realism in Greek art, reflecting their burgeoning interest in the human potential for beauty, both physical and intellectual.