Australopiths show a trend toward improved upright walking, smaller teeth, and greater hand dexterity. Like other early hominins, they retained a ____.

A) vertically split upper lip
B) skull that opens to the spinal cord at the rear
C) modern human-sized brain
D) chimpanzee-sized brain
E) prehensile tail

Australopiths

Refers to a group of extinct hominins closely related to humans, known for their bipedal locomotion and significant role in human evolution.

Hominins

Members of the human lineage after the split from our common ancestor with chimpanzees, including all modern and extinct human species.

Upright Walking

The ability to walk on two legs with the body held vertically or nearly vertically, a characteristic primarily associated with humans.