Under siege by the umayyads and abbasids , the old eastern roman empire had retreated to anatolia and parts of the balkans

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?

Otto von bismarck once said that a great war might someday be caused by some damed foolish thing in the balkans was he right, explain

10 points per question and brainlist 1. name four of the ruling dynasties of china. describe at least three contributions to society from each dynasty. 2. why did the qin ruler zheng burn chinese literature and philosophy books? how did the han dynasty establish a strong and effective government? why did people rebel against the sui rule? 3. what new technologies were invented during the tang dynasty and fully developed in the song dynasty that would eventually have a great impact on the world? explain why this technology had such an impact. 4. who were the invaders that seized control and took over the song dynasty? 5. how was china's history affected by its policies of isolation from the outside world during the ming dynasty?