Answer:
The hormone is A. Melatonin.
Explanation:
The pineal gland is located at the center of the brain and it is in charge of releasing melatonin. Its production is generally <em>inhibited by light and stimulated by darkness. </em>
One of its main functions is <em>regulating the sleep-wake cycle</em>, reducing one's body temperature in the process.
It was either smallpox or measles which arrived from Southern Asia.
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