If the thyroid gland makes a chemical substance that increase the rate of metabolism in the body, then what gland makes a chemical in the body to increase the rate of metabolism?

Answer choices:
- sweating
 - Follicle
 - A drug.
 - heat
 - lmestone
 - endocrine gland
 - Pituitary gland
 - Thyroid

 

        Thyroid  