How did technology change the us economy and contribute to the expansion of slavery in the south?

Which of the following factors would be a likely reason for low population density

What was the result on the u.s. economy because of the major changes in atlantic shipping prior to and during the war of 1812?

Why did un coalition troops battle iraqi forces in 1991? iraq had invaded saudi arabia, along with its other border nations.iraq had invaded kuwait, which was a major source of the world's oil.the united nations wanted to remove saddam hussein from power.the united nations wanted to prevent the trade of illegal drugs.