Which group or event eventually ended the byzantine empire?

On May 29, 1453 CE, Constantinople fell to the Ottoman Turks and the Byzantine Empire came to an end. Hope this Helps!

D. the ottoman turks

Explanation:

The Byzantine Empire fell in the 1453 until it fell into the days of the Ottoman Turks before which the empire was most powerful in terms of the economic, cultural and the military force. The fall of Constantinople was seen as a major event that led to the decline.