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Explanation:
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I believe the answer is A
According to the doctrine of separation of powers, the U.S. Constitution distributed the power of the federal government among these three branches, and built a system of checks and balances to ensure that no one branch could become too powerful.
<span>Regulation of internal processes regardless of what is happening externally is is called </span>Homeostasis.
The regulation is aimed to make our situation stayed the same as what we are used to. For example, if you're used to be in a cool temperature, your body will respond extremely to hotter temperature until you bring your body back to the cool temperature.