All birds lay eggs. No bird is ever born alive from the mother's body in the way that some snakes and fish are born alive.
Most female birds are very busy mothers. They do not leave their eggs to be warmed by the sun to hatch, as turtles do. Mother birds keep their eggs warm with their own bodies. Sometimes father's birds keep the eggs warm while the mother birds hunt for food.
Different kinds of birds must keep their eggs warm for different lengths of times before they will hatch, as takes twenty-one days for chicken to hatch. Goose eggs must be kept warm about twenty-eight days. Robins' eggs hatch in about fourteen days.
Some young birds can hunt for food in a few days after they are hatched. Young chickens, ducks, trukeys, and quails are able to follow their mothers around after a few days. But they do not really hunt for food
themselves. They follow their mothers and wait for them to find the food. Have you ever watched hens hunting food for boby chicks?
Young wrens and robins and owls, as well as many other birds, stay in the nest and wait for food to be brought to them.
Which sentence is correct?
All birds are born alive.
Some birds lay eggs.
All fish lay eggs.
Some snakes are born alive.