The document discusses the basic needs of animals to stay alive, including food, water, and air. It then categorizes different types of animals based on whether they eat plants, other animals, or both plants and other animals. Some animals that only eat plants are rabbits, squirrels, goats, sheep, pandas, and horses. Animals that only eat other animals include lions, snakes, seals, whales, dogs, and eagles. Animals that eat both plants and other animals are cats, chickens, ducks, and bears.