Why do animals say something somewhat specific?

Question

Cows say moo
Ducks say quack
What do moose say?

Give an educated answer, please

Answer 1

They don't actually "say" these things. These are human words designed to mimic their sounds. Its called an "onomatopoeia" and it varies in other languages. For example, in German, frogs go quack as well as ducks.

If you listen to a cow or a duck or a cat they don't really sound like 'moo' or 'quack' or 'meow'. And think about all the different sound they do make to express their feelings like for pain or mating or play. It can't be classified by one onomatopoeia.

Answer 2

that is how they communicate with their own species