If you are talking about the Second Industrial Revolution, then the person who had a monopoly in the steel industry was Andrew Carnegie.
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Answer:
Aqueducts
Explanation:
First developed around 312 B.C., these engineering marvels used gravity to transport water along stone, lead and concrete pipelines and into city centers.
Answer:
Spread Islam.
Explanation:
Islam religion spread in the regions of the Middle East. Arabs refer to an ethnic group who speaks Arabic language. Many Arabs followed Islam and were accountable for spreading through conducting trades. Arabs invasion in the older empires led to the founding of the Arab Empire. The Empire conquer the lands of unbelievers of Islam and convert them. The Empire ruled by the successors of Mohammed called Caliphate.
Into many kingdoms
After the fall of Roman empire, Germanic people spread all over europe and established small kingdom that ruled over the fragment of what used to be Roman's territory.
They defined the rules that they imposed to these territories as the 'barbarian law'