<span>New factory jobs attracted millions of immigrants.
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The North developed to be the factory power house of the USA, as early as colonial days.The main reason for this is becasue the physical environment of the North such as fast running rivers favored industries. This attracted more people into the area, who were looking for better opportunities.
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The correct answer is - Large numbers of migratory birds;
The number of the migratory birds has always been pretty high and it hadn't resulted in the drying up of the Ogallala Aquifer, not to mention that those birds can not even reach that water because it is underground. Also, the number of the migratory birds have been steadily lowering, so even if they were using that water for drinking, it wouldn't have caused the drying out.
The Ogallala Aquifer has started to dry out because of numerous reasons, with the usage of its water for irrigation being the prime reason. The droughts have become longer, and the temperatures little higher, while the rainfall slightly smaller, so all of that affected the reserves of water in the aquifer negatively.
"The Doctrine of Chances" is a theory that was proposed by Alfred Russell Wallace that related to the theory of natura selection of Darwinists. This doctrine is what we now consider "statistics." Wallace's idea was to use this doctrine of chances and averages in order to study population genetics.
From the 1600s to the mid 1800s, Japan isolated itself from
outside influences, and limited both its trade and relations with other nations
under what is called the sakoku policy, which is sometimes also called the “period
of national isolation”.
I believe it is both Greek and Rome, but more of Greek
Greek is mentioned in relation to democracy, especially the weaknesses of direct democracy, where citizens would congregate at the mount to air their views and elect the candidate of their choice. The candidate who had hired the most talented shouters often won. The limitation of mob type of democracy informed the rationale behind the electoral college.
Rome is mentioned in relation to the course of imperialism on national cohesion and stability, as well as the capture of a good democratic course by totalitarian regimes.
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