Final answer:
Bipedal organisms have undergone anatomical changes to maintain balance on one leg while moving. Early hominins, like Homo habilis and Homo erectus, had different locomotion adaptations compared to modern humans.
Step-by-step explanation:
Bipedal organisms have undergone significant anatomical changes to maintain balance on one leg while moving. Some of these changes include longer legs, a broader pelvis, arched feet, and a decrease in bone mass of the skull and face. Early hominin species, such as Homo habilis and Homo erectus, had different locomotion adaptations compared to modern humans, including high stepping gaits, slower walking speeds, and increased mobility in the elbow joint.