During the industrial revolution many people immigrated to the US for several reasons however since you asked about the industrial reasons I will only answer those. The US had a lot more opportunities than Europe, it is significantly larger and started to industrialize later, this made many more job opportunities open. This made the US a very good prospect for many people so filled with ideas about the "American Dream" they packed their bags and families and left for America. Other factors such as the crowded and ba conditions of the European cities also made the journey seem inviting. Other than industrial reasons racism an discrimination made many minority groups in Europe miserable, the Jews had been mistreated for years and in countries such as Austria-Hungary the non German speaking people were treated as lower class citizens, in Britain many irish and scottish men left for similar reasons.
Not too sure but to get you closer to the answer, Rocks aren't Minerals; They are comprised of 2 or more minerals, And Limestone is also comprised of minerals. Now between Silver and Gold, I'm not sure but there have been talk over the years as the Great Plains being the next location of a Gold Rush. But again I'm not too sure, but I hope this helps.
Explanation:
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Having experienced the same thing in my job, I think the most important reason for taking action after an error is that you did not want for other people to experience the consequences. This is especially true if the job is concerned with people as the direct clients or consumers.
Answer:
while obviously not everyone has an identical twin, according to experts it could be true that everyone has a twin that at least just look like them. we have all seen someone we have mistaken for someone else, and many of us have even been mistaken for another person.