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Human history, also known as world history, is the description of humanity's past. It is informed by archaeology, anthropology, genetics, linguistics, and other disciplines; and, for periods since the invention of writing, by recorded history and by secondary
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Farming was difficult due to limited amount of good soil and cropland. Hope this helps.:)
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first box - stronger leader
2nd box - weak leader
Answer:Indian mathematicians made early contributions to the study of the concept of zero as a number, negative numbers, arithmetic, and algebra. In addition, trigonometry was further advanced in India, and, in particular, the modern definitions of sine and cosine were developed there.
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