Answer:
The shape that could be used to describe the structure of social classes in early civilizations is the pyramid. In the absence of social classes the whole system will break down, and the social classes provide basis for a successful civilization.
The uppermost class was of the Brahmins, followed by Kshatriyas, Vaishyas, Shudras, Untouchables and last came the Adivasis.
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Answer:
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Answer: It stopped the expansion of Islam into Europe.
In 732 CE, Charles Martel and his troops defeated the Muslims in France in the Battle of Tours. His victory prevented the Muslims to further expand into Europe.