Which of these glands secretes releasing hormones? which of these glands secretes releasing hormones? hypothalamus adrenal cortex thymus ovaries testes?

The answer is Hypothalamus. Releasing hormones and inhibiting hormones are hormones whose main function is to control the release of other hormones either by stimulating or inhibiting the release of those hormones. For example hypothalamus uses thyrotropin releasing hormone to stimulate the production of thyrotropin hormone by the pituitary gland.