Final answer:
Brachiation is a form of arboreal locomotion involving swinging from branch to branch, typical of certain primates with long arms and specialized shoulder girdles.
Step-by-step explanation:
Brachiation is a form of locomotion that involves swinging from branch to branch. This particular mode of movement is associated with certain arboreal mammals, namely some primates, that have evolved long arms which facilitate this activity. In brachiation, one arm is used to reach for the next branch while the body swings forward, and then the other arm repeats the process, allowing the animal to effectively traverse through the treetops. The primate shoulder girdle is adapted for this, with a wide range of motion due to the presence of a collar bone (clavicle). Traits such as a prehensile tail and sticky pads on fingers can further assist with brachiation and other arboreal activities.