Why do some animals walk on *two legs* (Bipedal) while others walk on *four legs*?
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Several lizard species move bipedally when running, usually to escape from threats. Many primate and bear species will adopt a bipedal gait in order to reach food or explore their environment, though there are a few cases where they walk on their hind limbs only.
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Answer:
because thier evoluted that way
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