Estrogen and progesterone are hormones that play a crucial role in the growth and development of various parts of the body. In this case, the correct answer is option 3, the mammary gland.
The mammary gland is responsible for producing milk in females, especially during pregnancy and breastfeeding. Estrogen and progesterone control and stimulate the growth of the mammary gland. These hormones help in the development of the ductal system, which is essential for milk production.
Options 1, 2, and 4 are incorrect. The pituitary gland is responsible for regulating hormone production in various glands of the body, but it is not directly influenced by estrogen and progesterone. The thyroid gland produces thyroid hormones that regulate metabolism, while the supra-renal gland produces hormones such as cortisol and aldosterone, which are not directly related to the growth of mammary glands.