Select the mammal.

 - human
 - American toad
 - alpine newt
 - green frog
An American toad is an amphibian. It has moist skin and begins its life in water.
Toads do not have teeth! They swallow their food whole.
An alpine newt is an amphibian. It has moist skin and begins its life in water.
Some newts live in water. Other newts live on land but lay their eggs in water.
A human is a mammal. It has hair and feeds its young milk.
Humans are a type of animal called a primate. Monkeys and apes are also primates.
A green frog is an amphibian. It has moist skin and begins its life in water.
Frogs live near water or in damp places. Most frogs lay their eggs in water.