How long does a baby sleep after birth? A) ranges from 30 minutes to about four hours
B) between 20-45 minutes only
C) between 3-4 hours only
D) ranges from 2-3 hours only

Your baby will be tired after the efforts of being born. But as well as adjusting to his new life outside your womb (uterus), he's on a tremendous growth spurt and will need plenty of sleep to fuel this. Your baby may sleep for up to 18 hours over the course of 24 hours.

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.

if u need the answers look it up on google youll find it trust im just saying this incase no one out : )