The answer is the hypothalamus. It is a portion
of the brain that comprises a quantity of small nuclei with an assortment of
functions. One of the most significant purpose of the hypothalamus is
to connect the nervous system to the endocrine system through the pituitary
gland.
A positive control is when you test your experiment against something where you know what the effects will be, whereas a negative control would be when you test the experiment with something you know will have no effect.
Another part will get unbalanced which could also cause another part to go unbalance, then everything in the ecosystem dies. Hopefully this helped you out! Good luck!
