All I know is part A to the question :The geography of India greatly influenced the location of early settlements on the subcontinent. Both the Indus and the Ganges rivers carried rich silt from the mountains to the plains. When the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.
That would be the bubonic plague or the black plague for a more common name.
A)<span>They allowed the Romans to focus more on expanding into the Western Mediterranean.
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Medusa was a monster that turns people into stone
