There are five major groups of
animals, each with its own unique characteristics. First, we have mammals,
which are warm-blooded and usually have fur or hair. They give birth to babies
and often nurse them with milk. Examples include dogs, cats, and humans. Birds
make up a different group known for their feathers, beaks, and ability to fly.
They lay eggs, and some, like penguins, are great swimmers. Reptiles, such as
snakes and turtles, have scales and lay eggs on land. They are known for their
diverse shapes and sizes. Amphibians, like frogs and salamanders, can live both
in water and on land. They usually start as tadpoles in water and undergo a
transformation into adults. Fish, the fifth group, live underwater and breathe
through gills. They come in various shapes and sizes, from tiny guppies to
large sharks.