<span>German submarines, called U-boats, sank many Allied ships in the Atlantic Ocean.</span>
Answer:
In the North, the economy was based on industry. They built factories and manufactured products to sell to other countries and to the southern states. They did not do a lot of farming because the soil was rocky and the colder climate made for a shorter growing season. ... In the South, the economy was based on agriculture.
Explanation:
Brainlees please
d.) because checks and balances between the executive ,judicial, and legislative branches
