Why did so many immigrants come to the united states during the ninteenth century

My guess is because they were trying to to escape crop failure, famine, and harsh government they also wanted religious freedom and knew that america had plenty of opportunities.

P.S. when u give a question that has options please put the options down cause the people following ur inquiry will get confused

Your answer is: Many immigrants came to America seeking greater economic opportunity or in search of religious freedom

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.

jewish people sniffed up all of the money, thus making it hard for society