Which of the three traits considered in this film (bipedality, extensive tool use, and large brains) were present in the 3.2-million-year-old Australopithecus fossil (Lucy)?A. Lucy was a bipedal hominid with a brain size similar to that of modern humans, demonstrating that bipedality and larger brains evolved together.B. Stone tools were found in the same rock layer where Lucy was found, showing that members of this species were making and using tools 3.2 million years ago.C. Lucy was a bipedal hominid, and its discover provided evidence that bipedality preceded the evolution of a larger brain size and extensive tool use.D. Lucy had a large brain, but there is no evidence that it used tools or that it walked mostly on two legs.

Lucy was a bipedal hominid, and her discovery provided evidence that bipedality preceded the evolution of larger brain size and extensive tool use.

How important is Lucy's discovery?

It is one of the most complete fossils ever found. Because it is a very complete skeleton, compared to the fragments that are usually found, Lucy allowed scientists to better understand human ancestors and study size, shape and locomotion.

Whit this information, we can conclude that Lucy was a bipedal hominid, and her discovery provided evidence that bipedality preceded the evolution of larger brain size and extensive tool use.

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