Answer:
Adrenalin......................
People were forced to live a nomadic lifestyle due to the rocky terrain and deserts.
Explanation:
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1. Overpopulation.
2. Pollution.
3. Global Warming.
4. Climate Change.
5. Genetic Modification.
6. Ocean Acidification.
7. Water Pollution.
8. Deforestation.
9. Acid Rain.
10. Ozone Depletion.
plateau