Final answer:
Gibbons, or Hylobates, are known for using brachiation as their mode of locomotion, characterized by swinging from branch to branch with their long arms.
Step-by-step explanation:
Hylobates, also known as gibbons, are known for their distinctive mode of locomotion called brachiation, which involves swinging from branch to branch using their long arms. This form of locomotion is an efficient way to travel through the arboreal habitat where these primates live. The long arms of gibbons are a key adaptation that facilitate brachiation, allowing them to reach and grasp distant branches while moving through the forest canopy. In addition to their arm structure, gibbons have other physical adaptations such as a highly mobile shoulder joint and a reduced thumb size, which help to maximize their swinging capabilities and ensure a strong grip on the branches.