What was the most important impact of the slave trade on Europe?

Which at first gave the south an edge in the civil war? a. a better-equipped army b. the invention of ironclad ships c. the drafting of slaves into the army

There are 25 elements found in living things. how many of these elements are found in some organisms but not all? 1 , 6 , 19 , 25

What does one prolonged blast and one short blast mean?