Answer:
That That he would be overthrown by a future son. ...
Step-by-step explanation:
An oracle told king Acrisios told his future and how his daughter will have a kid that will kill him. your grandson will kill you. King Acrisios imprisoned his daughter to prevent the birth of his grand son and his death. After his daughter had a baby he put them in a box and set them off to sea to drown or starve.