Question

what is harmons and where it is located

Answer 1

Harmone are the juice secreted by glands as endocrine gland

Answer 2

a hormone is a chemical substance that is produced in minute quantities buy an endocrine gland.
or
Hormones are the chemical messengers used by the body by the endocrine system.

the parathyroid gland is located at the base of the neck near the thyroid gland. It produces a hormone called parathyroid hormone.