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The single most pressing issue that led to the civil war was slavery. It was the economic and political system that was central to the conflict.

John brown was a radical abolitionist whose sincere hatred of slavery that led him to seize the U.S. He was executed from hanging because of treason against Commonwealth of Virginia.

I dont know number 4 im sorry

Most slaves worked on plantations,Farms, and factories.

I was about to say that

Explanation:

the andes or andean mountains (spanish: cordillera de los andes) are the longest continental mountain range in the world, forming a continuous highland along the western edge of south america. this range is about 7,000 km (4,300 mi) long, about 200 to 700 km (120 to 430 mi) wide (widest between 18° south and 20° south latitude), and of an average height of about 4,000 m (13,000 ft). the andes extend from north to south through seven south american countries: venezuela, colombia, ecuador, peru, bolivia, chile and argentina.

from wikipedia

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