Final answer:
Australopithecus afarensis showed characteristics of both bipedalism and arboreality, exhibited through skeletal evidence and the Laetoli footprints.
Explanation:
Australopithecus afarensis exhibited traits of both bipedalism and limited arboreality. Skeletal evidence, including pelvis and lower limb characteristics, indicates bipedalism, while retaining some arboreal features such as a divergent hallux. The Laetoli footprints attributed to Au. afarensis further support bipedal locomotion.
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