Sure some girls start growing them faster than others if you are worried about such things talk about it to an adult you know well and trust. Many cahnges you are starting to go through may fell funny to you but are perfectly normal - don't worry too much.
Female breasts stop growing and developing by age 18.
you develop them when you start puberty you usually grow them when you are 10 or 11 years of age
your fat
because they are growing
Genetics
because they are growing.
no
Are they growing?
There growing, or your hormones are at a high level.
It basically are fancy words for "when your boobs/breasts are growing".
They are growing!
No sweetheart, your breasts wont stop growing! Wearing an underwire bra can actually keep them "perky."