Which is the best definition of contrapposto? an active pose a block-shaped pose an s-shaped pose?

The answer is "an s-shaped pose".

contrapposto is the point at which a figure remains with one leg holding its full weight and the other leg loose. This great posture makes the figure's hips and shoulders rest at inverse edges, giving a slight s-bend to the whole middle.  

Be that as it may, the S Curve includes a greater amount of the body than the contrapposto, and is thusly thought to be a further developed specialized advancement.  

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