Answer:
In several ways, Jesus fulfilled the kingship and victory symbolized in this act:
He fulfilled prophecy: The triumphal entry of Jesus into Jerusalem was a fulfillment of the prophecy in Zechariah 9:9, which said that the Messiah would come riding on a donkey. By entering Jerusalem in this way, Jesus proclaimed himself as the long-awaited Messiah.
He demonstrated his authority: By entering Jerusalem in such a public and bold way, Jesus demonstrated his authority and power. He was not afraid to confront the religious leaders and challenge their authority.
He claimed the title of king: The people who greeted Jesus with shouts of "Hosanna" were proclaiming him as king. By accepting their praise and allowing them to call him king, Jesus was claiming this title for himself.