most of the new borns babies cry because they find them selves in a new environment thet are taken from a dark place to the enlightened one. they also feel cold because the environment in their mother's woumb is warm they also cry because it is good for their lungs to breath air

well like he said is a very good reason!hope he helped u!

Because the baby never used environmental air to breathe before, his lungs burn until he gets used to it, that's why they cry. That's why people get worried when a baby doesn't cry when he's born, it means he is not breathing.