In: Biology
The feature that defines and distinguishes ALL hominins from the apes is:
the fact that we walk on two feet.
Our lack of a tail
Our larger brains than the earlier hominins (like Austrolapithecus).
Our 3-D vision
The correct answer to this question is option 1 which says that the walking on two legs is a characteristic feature that differentiate all hominins from apes.