Which of the following is a characteristic feature of hominins?

Bipedalism is a characteristic feature of hominins, which includes modern humans and their ancestors. This trait distinguishes them from other primates, who primarily move in a quadrupedal manner. Bipedalism is significant as it allowed for free use of the hands, which facilitated tool-making and carrying objects, as well as improved vision over tall grasslands. This adaptation was crucial for the survival and development of social behaviors in early hominins.

While larger body size compared to some other primates could be noted, it is not a defining feature of all hominins. The ability to fly is not a characteristic of any hominin species, and living in trees is more associated with earlier primates rather than hominins, who evolved to be primarily terrestrial. Thus, bipedalism stands out as the central defining feature of hominins in their evolutionary development.