Answer: Head, Chest, Brain (
Step-by-step explanation:
(The brain doesn't stop growing until the age of 25)
(People grow new "parts" of the body as they get older, and some have to wait until a certain age for those "parts" to grow 'in')
The head doesn't stop growing until age 5. (not a lot in age but you can tell the difference between a newborn and a child)