For crying out loud......and to let your parents know you've arrived safely.....it's most likely the only time your parents will smile when they hear you cry from there on in....:(
There is nothing like like a boob for for stopping them crying and making them content either.... :)
Even birds talk to each other, it's a useful evolutionary trait to be able to communicate effectively. The ones who did it best survived longest and propagated those genes. Maybe it was because they were able to say, "Wanna come back to my place?", lol. Homo sapiens is, however, the only species to have invented profanity, so stick that up your ...
Because humans are a superior creation to other creatures here on earth. We were created in God's image, endowed with the ability and gift of speech. (Genesis 1:26,27)