Breast develop due to action of
The breast is one of two prominences located on the upper ventral region of the torso of female primates. In females, it serves as the mammary gland, which produces and secretes milk and feeds infants. Both females and males develop breasts from the same embryological tissues. At pubey, estrogens, in conjunction with growth hormone, cause breast development.
Progesteron
Oestrogen
Activin
All of the above
Endocrinology