As animals don't have an actual language with words for them to communicate they have to use their other senses, and in this case it is by sound. Every single animal in the world makes a different sound in order to communicate with their species. By using their distinct sound(s) each animal can "talk" to warn each other of a predator, locate each other, and more.

This article talks about the importance of speaking development of babies from ages 0 to 12 months old. It helps parents (and others) understand how a baby tries to communicate their feelings with the noises they make. It is useful to know the way babies try to speak to us in order to understand if they are hungry, tired, happy, etc. and be able to respond to their needs.

This article by Maria Morava explains how language is more important to our daily lives than we may think; as languages can bring people together worldwide.

This chapter from "World Literature Today", by Sydneyann Binion and David Shook, talks about how languages and the cultures connected to them are constantly moribund. There are people who are trying to revive these dying languages around the world, however the process of doing so is complicated.