How does the work of Eastern Orthodox missionaries Cyril and Methodius show the influence of Byzantine culture on early Russia?

Russian emperors took the title tsar.
Russian bishops forbade the use of icons.
Russians adopted the Cyrillic alphabet. * MY ANSWER
Russians began speaking and writing in Greek.

Cyril and Methodius were Byzantine missionaries who spread Christianity and literacy in Eastern Europe, including Russia. They developed the Cyrillic alphabet as a means of translating the Bible and other religious texts into the Slavic languages spoken in the region. This adoption of the Cyrillic alphabet by the Russians shows the influence of Byzantine culture on early Russia, as it was a way for them to connect with the Orthodox Christian faith and the culture of the Byzantine Empire. Additionally, the use of the Cyrillic alphabet helped to preserve and spread Byzantine cultural and religious traditions in the region.