In 1854, the controversial Kansas-Nebraska Act, split two
existing political parties the Whig party and Jacksonian Democrats and led to
the creation of the Republican party. Kansas-Nebraska act overturned the Missouri
compromise and allowed settlers to decide whether slavery would be allowed in
their state. This led to the creation of the Republican party founded by anti-slavers
whose primary objective was fighting slavery.
Global warming "<span>B. threatens polar ecosystems". All the other answers are false, especially answer A. There is a lot that can be done to stop global warming, such as reducing energy consumption.</span>
I think it might be the Dudh Kosi river
Its a first source
Because it was written in that time and it showed original thinking and she was there first hand.