Final answer:
Gibbons use their long arms to move from branch to branch in a form of locomotion called brachiation. The development of brachiation in gibbons played a role in the evolution of bipedal walking.
Step-by-step explanation:
Gibbons use their long arms to move from branch to branch in a form of locomotion called brachiation. Brachiation involves swinging from one branch to another using the arms, while the body remains suspended underneath. This method of movement is facilitated by the gibbons' long and flexible arms, which allow them to cover large distances quickly and efficiently.
The development of brachiation in gibbons played a role in the evolution of bipedal walking. Bipedalism, or walking on two legs, is a unique characteristic of humans and some other primates. The adoption of brachiation by gibbons may have influenced changes in the anatomy and locomotion of our early hominin ancestors, leading to the development of bipedal walking. The transition from brachiation to bipedalism likely involved a combination of factors, including changes in limb proportions, the development of a more stable upright posture, and adaptations for efficient bipedal locomotion.