Animals eat and get their food in different ways. Mosquitoes suck blood from the body of human beings. Snakes swallow their food whole. Elephants have a long trunk. They lift their food with this trunk and put in into their mouths.
Birds have beaks and claws.
Rabbits, rats, squirrel, etc. have sharp front teeth to gnaw seeds and fruits. So that animals remain healthy, grow and get energy to survive and protect themselves from enemies. Birds, reptiles and mammals also breathe through lungs. Animals get oxygen while breathing, which burns the food within their bodies and they get energy to do work. Maintain a notebook.