Endocrine anatomy physiology 2

The major glands of the endocrine system are the hypothalamus, pituitary, thyroid, parathyroids, adrenals, pineal body, and reproductive organs (ovaries and testes). The pancreas is also a part of this system; it has a role in hormone production as well as indigestion.

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there

i think your answer is a. coordination