What happened to the US trading posts on the African Coast?

How did the union blockade of the southern coast affect the confederacy? it forced the confederacy to build new railroads. it contributed to shortages of weapons and food. it encouraged europe to trade with the south. it halted all trade, leaving the south without supplies.

Mid to high level clouds that look like layered blankets are called

Does anyone know why the second great awakening occurred? (i need an answer asap because this is a question on my assignment! < 3 : ))