Some snakes eat other snakes, even poisonous ones. The poison does not do them any harm . Snakes can swallow  things that are bigger around than they themselves are. This is possible because the jawbones  are loosely joined, and the mouth can stretch to make room for a fat animal. The snake's slim body stretches to make space for the animal when it is inside. Many snakes eat birds' eggs or frogs . Others eat pests , mice and other animals that harm crops on farms. Because snakes do this valuable work, you should never kill one. It is too dangerous for you to kill a poisonous one. Leave that job to experts. Which of the following groups of food is usually had by a snake?
Mice, crops, birds' eggs. Pests, frogs, some animals, plants. Birds' eggs, frogs, all animals, other snakes. Mice, frogs, pests, some animals, other snakes.