Select the amphibian.
A: piranha
B: emerald tree boa
C: ostrich
D: red salamander
An ostrich is a bird. It has feathers, two wings, and a beak.
The ostrich is the largest bird alive today. Ostriches cannot fly, but they can run very fast.
A piranha is a fish. It lives underwater. It has fins, not limbs.
Piranhas have sharp teeth. Piranhas hunt in groups. A group of piranhas can eat a large animal.
An emerald tree boa is a reptile. It has scaly, waterproof skin.
Tree boas eat small mammals, birds, lizards, and frogs. Tree boas only need to eat once every few months!
A red salamander is an amphibian. It has moist skin and begins its life in water.
Red salamanders do not have lungs. They breathe through their skin!