Question

Why the dental system in animals does has different types of teeth?

Answer 1

Hint: The types of teeth depend upon the food the animals eat or the diet that animals consume.

Complete answer: Teeth are among the most distinctive features of mammal species.
Paleontologists use teeth to identify fossil species and determine their relationships.
In herbivorous, as plant matter is hard to digest they have molars that are flat as they require them for the grinding of leaves and incisors are absent in herbivorous.
Carnivores are meat eaters and posses defined canines to tear the body of the prey.
Omnivores evolve teeth with both the molars and canines as they are plant and meat-eater both.
By which we can say that animals are different because of their different eating habits.

Additional Information: Teeth are hard structures found in all vertebrates.
Humans have different types of teeth to perform various functions such as cutting, tearing, shearing, grinding, and crushing.
Adults have 32 teeth in total eight incisors, four canines, eight premolars, and twelve molars.
Humans and other animals vertebrates, reptiles are all classified as diphyodonts as they possess two successive sets of teeth in their lifetime milk teeth and permanent teeth
Other vertebrates are classified as polyphyodonts i.e. their teeth are continuously replaced during their lifetime.

Note: Human canines are small due to different modes of taking food.
Wisdom teeth are the third or last molars. They besides being small appear very late or do not appear at all. This suggests that they are becoming useless and may eventually disappear.