* Carnivores: These animals primarily eat meat. They have sharp teeth for tearing flesh and powerful digestive systems for breaking down protein. Examples: lions, wolves, sharks.
* Herbivores: These animals primarily eat plants. They have flat teeth for grinding vegetation and digestive systems adapted for digesting cellulose (the tough fiber in plants). Examples: cows, deer, horses, rabbits.
* Omnivores: These animals eat both meat and plants. They have a combination of sharp and flat teeth and digestive systems that can handle both types of food. Examples: humans, pigs, bears, chickens.
There are also other less common categories like insectivores (animals that eat insects), frugivores (animals that eat mainly fruit), and nectarivores (animals that eat nectar from flowers).
It's important to note that these categories are not always strict. Some animals may eat a wider range of food than their primary category suggests, depending on availability and other factors.