Final answer:
The foot supinates to become pliable for uneven surfaces during heel off and toe off. Pronation, on the other hand, is the movement that allows the foot to adapt to different surfaces and absorb shock.
Step-by-step explanation:
During heel off and toe off, the foot performs different functions.
The correct answer is C. Supinates to become pliable for uneven surfaces.
Supination is the movement of the foot that helps to shift body weight to the outside edge of the foot, providing stability on uneven surfaces.
Pronation, on the other hand, is the movement that allows the foot to adapt to different surfaces and absorb shock.