Please Only Answer If You Have Studied The " River Valley Civilizations)". Choose two categories from the River Valley Civilizations sheet. Then, write an essay comparing and contrasting the four civilizations in those two categories. For example, you could choose to compare and contrast the governments and the writing systems of the four civilizations. Provide specific information in your essay. Be sure to explain both how the civilizations were alike, and how they were different, in those categories. You can use the River Valley Civilizations sheet as a reference. ( Will Mark Brainliest to whomever can actually help me without recopying someone else answers that are already on here. Will Mark Brainliest

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?