How the oracle given to king arcisius was fulfilled?

The oracle given to King Acrisius of Argos foretold that he would be killed by his grandson. To prevent this fate, Acrisius imprisoned his daughter Danaë, but she was visited by Zeus and bore a son, Perseus. When Acrisius later encountered Perseus during athletic games, an accidental throw of a discus caused his death, thus fulfilling the oracle's prophecy. This twist of fate highlights the inevitability of destiny despite Acrisius's attempts to escape it.