Hieroglyphics is how they communicated but not really. It was used as symbolism i guess you could say. Have you seen those movies where you see all the ancient art on the inside of caves?? That's basically what it was in Egypt except it was used as art
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.