What does the positioning of the toe indicated by the arrow in this figure suggest about the owner of this fossil hominid foot?

Question

Quizplus · Accepted Answer

The positioning of the toe indicated by the arrow suggests that the foot belonged to a hominid that walked upright on two feet, as the orientation of the big toe in line with the other toes is a characteristic of humans and other bipedal species. The presence of opposable big toes in primates is associated with an arboreal lifestyle, but the orientation of the big toe in the fossil hominid foot suggests that it was not adapted solely for arboreal locomotion.

What Does the Positioning of the Toe Indicated by the Arrow