Animals grow up in different ways. Some newborn (新生的) animals are helpless but their mothers protect them. A newborn kangaroo is very small. It is only a few centimetres (厘米) long. It closes its eyes and doesn't have hair. It stays safe in its mothers' pouch(育儿袋) for a long time. A newborn monkey can not walk. Its mother carries it everywhere.
Other baby animals can walk soon after they're born. They learn to run with their mothers when danger is near. A baby zebra can run, an hour after it is born.
Some baby animals are born in a place that is safe. Baby wolves are usually born in big hales with little light. Other baby animals are born in the open. A baby elephant is often born on open land.
Animals that drink their mothers' milk are called mammals (哺乳动物). A mother bear's milk is rich. Baby bears have milk for a few months. This is the same with baby zebras, As baby animals grow, they need solid (固体的) food. Baby lions cat what their mother can catch!
