USA HISTORY

Detailed explanation-1: -The expansion and colonization in the Western part of North America also exterminated many native species such as the bison, deer, and moose which lead to other species of animals dying off.

Detailed explanation-2: -The idea of Manifest Destiny arose in response to the prospect of U.S. annexation of Texas and to a dispute with Britain over the Oregon Country, which became part of the union.

Detailed explanation-3: -President James K. Polk had accused Mexican troops of having attacked Americans on U.S. soil, north of the Rio Grande. But Mexico claimed this land as its own territory and accused the American military of having invaded.

Detailed explanation-4: -John Louis O’Sullivan: (1813-1895) American editor who coined the phrase “Manifest Destiny” in 1845 to promote the annexation of Texas and the acquisition of the Oregon territory.