This document discusses how different animals use different body parts for movement. It provides examples of how mammals like horses and giraffes use long legs to walk or run fast, while cheetahs and gazelles use their legs to run very fast. Reptiles like snakes use their body to move without limbs, while lizards and crocodiles have short legs to crawl. Fish use fins and tails to swim, and amphibians can live on land and in water using legs or tails. Birds fly using feathers and wings, while some that cannot fly walk or run instead. Insects crawl using six legs, and some like butterflies also have wings.