Answer:
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Explanation:
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The answer is B) Inca. Extensive road network across plains, deserts and mountains reaching all corners of the empire was one of the notable features of the Inca empire like terraced farming, canals, crop rotation and irrigation as agricultural innovations. It allowed smooth military operations, trading, and the use of runners or chasquis.
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Burning coal, oil and gas produces carbon dioxide and nitrous oxide.
Cutting down forests (deforestation).
Increasing livestock farming.
Fertilizers containing nitrogen produce nitrous oxide emissions.