They were nomadic. They moved in search of food, resources and shelter.
Central powers: (WW1)
Germany, Austria-Hungary, and Turkey
Axis Powers: (WW2)
Germany, Italy, and Japan
My teach told me as well put the central powers just in case.
Sorry if I am wrong.
Turbidity. As your book/question states it is a measurement of cloudiness in water.
Immigration was certainly a key factor in the growth of America's economy . The Industrial Revolution came with massive technological developments, and the chance to exponentially improve the production rate of factories. However, to operate these emerging industries it would take a tremendous amount of laborers. American citizens working alone, weren't going to be enough. In other words, the peak of immigration influx allowed the U.S. to take full advantage of the possibility at the right time.
Hope this helps!
"<span>C. He believed strongly in the Union and the power of compromise in balancing rights" is the best answer. Calhoun was a fan of strong national government early on, but then switched to favoring states' rights. </span>