The beast of burden that is more less the unofficial animal of peru is?

The american civil war most former enslaved african americans in texas began making a living as

How did southern slaveholders attempt to convince people in the north to support slavery?

One drawback of voluntary trade is that it a.requires two groups to use a common language b.can make one group dependent upon another for necessary goods c.doesn't occur unless there is a shortage of goods for at least one group d.forces groups to rely on themselves to produce all the goods they need