What have we learned about the fall of the Roman Empire and how that lead to the Middle Ages.

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

Stories that are passed down through generations by word of mouth are called

Commercial agriculture consists of raising food for trade and profit, while subsistence agriculture focuses on -- a. providing the basic needs of the farmer's family b. providing the basic needs of the neighboring communities c. creating more arable land for future use d. obtaining subsidies from governments and corporations