Animals can move around and interact with their environment, but they cannot make their own food.They feed on other living organism.Wecan classify by their basic body structure.
Vertebraes
Vertebraes are multicellular, heterothrop organism that have an internal skeleton with a skull and backbone.
Fish
Live in marine or freshwater ecosystems.They have fins that help them to move.They can be omnivores or carnivores.
Anphibians
Live on land or water.Some have soft skin and others have a tail.Adult amphibians are carnivores.
Reptiles
Can live on land or in water. Most of them have tail and scales covering their body .Some are herbivores,but must of them are carnivorous.
Birds
They have wings that help them to move.
Mammals
They can walk,fly, swim or hop. They can be herbivores,omnivores or carnivores
Invertebrates
Are animals that do not have backbone. They include jellyfish,crustaceans,worms, snails, insects and spiders. Their diet depends on the habitat they live.
Arthropods
Have an exoskeleton.These organism include insects,crustaceans, arachnids and myriapods.
Mollucs
Have a soft body. These organisms include cephalopods, bivalves and gastropods.
Echinoderms
Have a soft body and a hard, internal skeleton.They include starfish and sea urchins.
Annelids
Annelids such us earthworms, cnidarians, such us corals, and sponges, such as sea sponges ,are also Invertebrates.