Iron was a great tool that had many uses, they secured houses and could be made into swords. The working of iron melted it so you could form sturdy and strong tools.
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When they act against their common interests and/or threaten the safety of the people without cause. Basically, if they cause unecessary harm to the people of that country or state etc.
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Answer:
planets in the solar system revolve around the sun.
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A) The amount of goods that are produced.
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Since more food was available, their population grew. New areas were settled, which developed into cities. Increased trade routes by roads, waterways and sea ports increased trade for Chines merchants, to other parts of the world.
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