You did not give any choices, so maybe this explanation would help you out.
Endocrine glands are glands that specifically secretes HORMONES and they secrete these hormones internally. Endocrine glands include:
Thyroid
Parathyroid
Thymus
Adrenal
Hypothalamus
Pineal Gland
Pituitary Gland
Pancreas
Ovaries
Testes
These endocrine glands secrete specific hormones that trigger specific reactions as well. They are integral to the proper functioning of life processes such as growth, reproduction, metabolism, homeostasis, and controls the internal and external reactions to the environment (including situations that occur).
