tripedal
quadrupedal
octopedal
Correct!
Most mammals and reptiles on the planet are quadrupeds, or walk on four legs. Humans are the only mammals that walk completely upright.
locomotion
Animals swim, walk, crawl, slither, squirm, and even fly through the air. They can catch free rides by attaching themselves to other creatures, or by traveling on drifting logs. There are almost as many different forms of locomotion, or ways of moving, as there are animals in the sea. Animals need to travel to hunt for prey, escape from predators, migrate for the season, or search for a mate.