The answer is D. In caste systems you are born into a certain level of society and cannot change that.
Answer: Bassically, certain gasses like CO2 (Carbon Dioxide) that come from stuff like burning fossil fuels and global warming, they heat up the earth, are wastes and are used as fuel.
Answer:
The largest cities in Ouachita Mountain subdivisions are: Hot Springs and Mena (Polk County). Other smaller county’s include: Mount Ida (Montgomery County), Glenwood (Pike County), Jessieville (Garland County), and Caddo Gap (Montgomery County).
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Why might a post classical civilization want to conquer Egypt and the Nile River Valley? It's fertile land provided the foundation for the first human civilizations and its access to the Persian Gulf and location between Europe, Asia, and Africa made it a center of trade.