Answer:
Disagreements about the Bible as the religious text and the use of icons
Step-by-step explanation:
The Great Schism occurred because of the disagreements between the Eastern and Western churches. The two churches had multiple disagreements over the interpretation of some of the religious texts, but also about the usage of icons. The icons actually made the bigger problem, as the Western Church was forbidding usage of them and considered that as improper, while the Eastern Church was widely using them and they became essential part of the religious objects and art. Eventually the two churches split, leading tot he formation of the Roman Catholic Church with its seat in Rome, and the Eastern Orthodox Church with its seat in Constantinople.