Which religion was changed during the reformation?

this is not a question its simply asking you to read and write a few sentences and   the question on the bottom its fairly easy, you can do this!

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).