Final answer:
The movement of the foot sole turning outwards is known as eversion, which stabilizes the foot during various activities.
Step-by-step explanation:
When the sole of the foot is turned outwards, the ankle is considered to be in an eversion movement. This movement involves the intertarsal joints of the foot, where the bottom of the foot is turned laterally away from the midline. It is distinct from inversion, which turns the bottom of the foot towards the midline. Eversion is an important motion that helps stabilize the foot during activities such as walking on uneven surfaces or quickly changing direction in sports.