The Industrial Revolution changed the economy as it created more jobs, increased trade, and raised prices and lowered salary's. The Industrial Revolution opened a window for large business companies and factories for many, but factory life was very harmful and paid little to none. Thus requiring families to have children work just to have enough income for basic necessities. Trade was on the rise as goods were manufactured swiftly and efficiently.
The Industrial Revolution changed society as it caused urbanization, decreased safety, caused huge overcrowding and pollution. During the Industrial Revolution, safety within factories was not a priority and many workers were harmed or killed in work. Overcrowding occurred as many had to move from rural to urban areas to get jobs, thus crowding in slums and tenants. Pollution, specifically air and water pollution, was on the rise as smoke from factories increased green house gases and factories dumping out sewage in open bodies of water polluted the water.
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The Spanish conquistadors believed them to be infidels. They would read them a note from the Pope in Spanish that they wouldn't understand in which they would proclaim that their land would now be Spanish because Spain is governed by one true God, and after that they would slaughter them if they wouldn't surrender.
For number 5, is D. For number 6, is C. For number 7, is B.
So basically bud they declared war because Germany had sunk the Lusitania and was therefore trying to abandon the policy against unrestricted submarine warfare