The answer to this question is
A Hypothesis allows you to make a prediction about future experiments , But a prediction is more specific and Prediction are using forms like ("IF" and "Then") and Hypothesis is more like a regular sentence
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The correct answer is sympathetic nervous system.
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The sympathetic nervous system is a component of the autonomic nervous system, together with the parasympathetic system. Their functions are opposite but coordinate to maintain homeostasis. The sympathetic system has a role to control the body's response during perceived threat (fight and flight reactions). According to this, it dilates the pupils, contracts the muscles, increases heart rate...</span>
I think it's because of their range of tolerance.
Answer:
Parathyroid hormone
Explanation:
This is one of the most essential hormones in your entire body.