The pineal gland, also known as the pineal body, is responsible for releasing melatonin. The pineal gland is a "small endocrine gland in the vertebrate brain."
Hope this helps! The quoted part came from Wikipedia.
Inertia is the opposing of gravity so...
Answer:
the drought, changing weather patterns, and human activities led to deforestation and subsequent soil erosion. These events precipitated the collapse of the Easter Island society.
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