Contrapposto means 'opposing positions".
Two ideas the master artist will pay very close attention to is symmetry and asymmetry. Asymmetrical positions, contours, lighting, etc will add drama to your work.
Contrapposto focuses on how the leaning, facing, and/or the tilting positions of two or more forms can be oriented into different, asymmetrical positions one to the other.
Suggested Homework:
Using the reference provided practicing constructing your figures with a careful eye on the contrapposto.