What has this to do with reading? Babies who have been spoken to often pick up the sounds of their native language. They learn the patterns of sound that make words and sentences. They learn that when there is a pause in the sounds, that is a good time for them to respond (with babbling at first). They learn vocabulary. When the time comes for them to connect sounds, intonations, pauses and vocabulary with written letters, they are way ahead of children who have limited exposure to oral language.
It’s fair to say that the groundwork for teaching a child to read begins in the womb. –Mrs. K