The correct answer is letter B.
Explanation: The arrival of the Genoese navigator in America provides natives of the New Continent or contact with a plethora of microorganisms that were not known to them. The most striking example was a variable, which was nonexistent on the American continent and was brought with Europeans. The result was the extermination of the American population through disease rather than wars. Ignorance of the causes of diseases caused by indigenous people does not isolate patients, thus avoiding the contagion of other inhabitants of a village. Since they did not know that microorganisms were also transmitted by air, when a village was infected, a disease spread, leading some of the inhabitants to seek refuge in another village, spreading as diseases and as deaths.
Because there will always be water on earth, meaning that the cycle will never stop. And because the cycle is continuous and natural. I don't think anything can stop it from happening.
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Most of today's suburbs were farmland during the 1940s. ... Understanding why people began moving to the suburbs is important. The migration had a huge impact on U.S. energy use (suburban living encourages driving; urban living encourages walking) and schooling (suburban schools are often superior to urban schools).
Answer: a. The national government instituted regulations to handle environmental issues.
The 1960s and 1970s were a period of increased awareness about environmental issues among the population. One of the catalysts was the book <em>Silent Spring</em> (1962) by Rachel Carson. The book discussed the negative effects of pesticides, in particular DDT, on wildlife. The 1969 Santa Barbara oil spill also generated public outrage. As a result, many regulations were passed in order to protect the environment. Moreover, those that already existed were reviewed and rewritten to make them more comprehensive.
Answer:
it was used on a much larger scale for the purposes of mass agricultural labor, as it was an economic alternative to other workers. However, without the large plantations of cash crops that needed such slave labor in the North, the Northern slaves were less common and not a primary source of agricultural production.
