Well I've noticed that people who are more overweight than others tend to have larger breasts but PLEASE DON'T EAT LOADS JUST TO GET BIGGER BREASTS! You'll regret it if you do. I'm not sure if this is true, but I've heard that lots of arm-swinging can make your chest larger. Or there's plastic surgery, but since you're asking this in female puberty, I would just wait for them to grow :)
an uplift bra is a bra that makes your breasts look larger
No. You may be gaining weight due to the meds and that makes breasts larger because of the weight, but they don't enlarge on their own. This is decided by the body and hormones.
It is normal for your breasts to get larger as you grow.
Some bras don't make your breasts any bigger or smaller they just give support. push up give you cleavage padded makes your breasts look larger when they really are not!
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No.
None. Breast size is not affected by what you eat or drink.... unless it makes you gain a lot of weight.
Genetics
Bombshell
Hormones
no
No. Even though you may see some advertised. Breasts are made of fat and there is muscle underneath. You can make the muscle tighter by doing exercises, such as push ups. The breasts themselves are fat and they can get smaller if you lose weight or larger if you gain weight. The skin on the breasts is thinner and more elastic than the skin on other parts of your body. No spray exists to make breasts "tight."