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Which of the following would shift the production possibilities frontier outward?
Serotonin
A chemical messenger that plays a crucial role in regulating mood, digestive functions, and sleep patterns.
Carbohydrates
Organic compounds consisting of carbon, hydrogen, and oxygen atoms, crucial for providing energy to the body's cells, especially the brain and muscles.
Norepinephrine
A neurotransmitter and hormone involved in the body's fight or flight response, affecting mood and arousal.
Settling Point
A theory suggesting that weight tends to stabilize around a point at which there's a balance between energy intake and expenditure.
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