<u>CIVIL AND POLITICAL PARTICIPATION OF JESSE JACKSON:</u>
Jesse Jackson, the African American civil activist turned politician is one of the national heroes America ever had. He being a black at America, faced racism against which, he started his fight with his civil rights activities.
He then turned into a politician, served as a shadow US senator and his name was in the US presidency nominations twice consequently which was itself a great achievement for anybody, especially for someone whose race faces most taunted non-humanitarian racist feelings. Hence, his civil and political participation was significant as it helped the backward people to take one step forward.
The Pre-Columbian era incorporates all period subdivisions in the history and prehistory of the Americas before the appearance of significant European influences on the American continent, spanning the time of the original settlement in the Upper Paleolithic period to European colonization during the Early Modern period.
While the phrase "pre-Columbian era" literally refers only to the time preceding Christopher Columbus's voyages of 1492, in practice the phrase is usually used to denote the entire history of indigenous Americas cultures until those cultures were exterminated, diminished, or extensively altered by Europeans, even if this happened decades or centuries after Columbus's first landing. For this reason the alternative terms of Precontact Americas, Pre-Colonial Americas or Prehistoric Americas are also in use. In areas of Latin America the term usually used is Pre-Hispanic.

1) x=9, because we can use the Pythagorean theorem, x^2 + 144 = 225, x^2 = 81
2)
, because 6^2 +6^2 = 72, 
3)
, because 
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Southern American accents sound like the stereotypical gay accent tbh. But the Northern American accents sound friendly although my mum thinks it's like german accent (assertive I supposed?) and my friend thinks it's loud and mouthful.