Answer:
Step-by-step explanation:
A. Icon use
The Great Schism of 1054 was a significant event in the history of Christianity that divided the Eastern and Western churches. One of the main causes of the schism was a disagreement over the use of icons, which are religious images used in worship. The Eastern Church, also known as the Byzantine Church, believed in the use of icons and considered them to be an important part of their religious practice. On the other hand, the Western Church, also known as the Roman Church, rejected the use of icons and considered them to be a form of idolatry. This disagreement over the use of icons ultimately led to a separation between the Eastern and Western churches, which has lasted to this day.