A girl found the skull of an animal. She didn't know what the animal was, but she was sure it preyed on other animals for its food. What could have led her to this conclusion?

When you don't know whether an animal was once a Carnivore, Omnivore, or Herbivore, all you have to look for is the teeth. Carnivores have long canines, as well as overall sharper teeth, while omnivores and herbivores contain flat molars.