The correct answer is option 4, the hypothalamus gland. The hypothalamus gland is located in the brain and plays a crucial role in regulating the secretion of hormones from the pituitary gland. The hypothalamus receives signals from various parts of the body and uses those signals to regulate the production and release of hormones from the pituitary gland. It does this by releasing special hormones called releasing hormones that stimulate or inhibit the release of specific hormones from the pituitary gland. This control over the pituitary gland allows the hypothalamus to regulate various bodily functions such as growth, metabolism, reproduction, and the stress response. Therefore, the hypothalamus gland is responsible for controlling hormone secretion from the pituitary gland.