The answer would be osmosis
Childbirth is scary enough for adult women, let alone an uneducated adolescent (depending on age). all women in labor need a coach, spouse or parent to comfort them through the delivery process to let the future mother know these stages are normal.
It's called a mutualistic relationship! :)
I hope this helps!:)
Ionic, since electrons are transferred.<span />
Surface tension of water is 72 dynes/cm<span> at 25°C . It would take a force of 72 dynes to break a surface film of water 1 cm long.
Hope this helps.</span>
