First 90 words of the document:
Phonological development: how a child develops their use and understanding of the
sounds of language.
In the first year of a baby's life,
they progress in their ability to
make sound, from crying, to cooing, to babbling and finally to pronouncing
their first word. By the time a child is 1, they will have learnt a great deal
about the way adults use sound to express meaning, but their own ability
to produce the sounds that they've heard lags behind.