Answer:
material that current can pass through easily
A developed country is a sovereign country that has a developed economy and advanced technological infrastructure relative to other less industrialized nations.
The one that describes an important social change during the Bronze age is :
The division of labor allowed people to specialize in different trades
With this division , many citizens could choose the work that is suitable for their skills/gift
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They would be diagnosed more with the common flu or common or current virus like anitbacterial