Final answer:
Byzantium's influence on Russia included the adoption of Christianity, use of Cyrillic script, and the title tsar.
Explanation:
Reliance on yams in cooking is not an example of the influence of Byzantium on Russia. However, adoption of Eastern Orthodox Christianity, use of Cyrillic script, and use of the title, tsar are all clear examples of Byzantine influence on Russia. The adoption of Christianity and the Cyrillic script, as well as the use of the title tsar, all demonstrate the deep cultural and historical connections between Byzantium and Russia.
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