What's the difference between an herbivore, a predator and an omnivore?

Herbivore: an animal that eats plants

Predator: an animals that eats meat

Omnivore: an animal that eats both plants and meat

In general, meat-eating carnivores have teeth for tearing and skulls capable of biting with great force, while the plant-eating herbivores have teeth and skulls equipped to grind tough vegetation. Omnivores, which eat both plants and animals, have skulls and dentition suitable for a wide range of foods.