The Endocrine System makes and releases hormones.
Option B
Explanation:
Endocrine system consists of several glands which produces several chemical reactions in the body it is responsible for the inhibiting and activating mechanism of the hormones. These hormones are of different types which are growth, reproductive as well as our mood is based on the hormones. The endocrine system is responsible for making and producing of these hormones. Endocrine system is based on the chemical messenger with feedback loop of the hormones.