Final answer:
The Byzantine Empire's fall is a main cause of the Renaissance.
Step-by-step explanation:
The main cause of the Renaissance that is NOT mentioned in the options is the fall of the Byzantine Empire. The fall of Constantinople in 1453 resulted in many Greek scholars fleeing to Western Europe, bringing with them Greek and Roman texts. This influx of knowledge played a significant role in sparking the intellectual and cultural movement of the Renaissance.
Learn more about Causes of the Renaissance