1) The key characteristics of fall of the roman empire are :-
•Decline in Morals and Values.
•Public Health.
•Political Corruption.
•Unemployment.
•Inflation.
•Urban decay.
•Inferior Technology.
•Military Spending
2) The Byzantine Empire was the eastern continuation of the Roman Empire after the Western Roman Empire's fall in the fifth century CE. It lasted from the fall of the Roman Empire until the Ottoman conquest in 1453.
3) The fall of Rome also paved the way for another major part of Europe's history: feudalism. ...This eventually developed into the system of feudalism that dominated medieval Europe. Feudalism helped prevent another strong centralized government, like that of Rome, from forming in Europe for hundreds of years.
4)The East–West Schism is the break of communion since the 11th century between the Catholic Church and Eastern Orthodox Church. The schism was the culmination of theological and political differences which had developed during the preceding centuries between Eastern and Western Christianity.