Final answer:
Bipedalism is the ability to walk on two legs and is unique to humans. It offers advantages in terms of movement efficiency and endurance compared to walking on all fours.
Step-by-step explanation:
Bipedalism refers to the ability to walk on two legs. It is a form of locomotion that is unique to our own species, Homo sapiens. In terms of movement efficiency and endurance, bipedalism has several advantages over quadrupedalism, which is walking on all four legs. Bipedal organisms are able to cover long distances more efficiently because they have a more energy-efficient gait and use less energy compared to quadrupedal organisms. Additionally, bipedalism allows for a greater range of vision, which is beneficial for spotting predators and resources, leading to better endurance.