I need help with my History Homework- High Middle Ages?

That would be a difficult answer for any of us since we dont have your class. Do u have a book with a chapter on that? If u do, skim through that section to find those answers or otherwise if u dont have a book, put on google search, Agricultural Advances of the European high middle ages. You should get some responses on that or move the words around a bit for other results. Its going to take some time nomatter what. Same for your other question. Ask those questions on your google search.