Final answer:
Pelias sent Jason to get the Golden Fleece in order to get rid of him and gain the favor of the gods.
Step-by-step explanation:
Pelias sent Jason to retrieve the Golden Fleece as a way to get rid of him. Pelias was afraid that Jason, who was the rightful heir to the throne of Iolcus, would eventually try to take the throne from him. So, he devised a plan to send Jason on a dangerous and almost impossible mission to retrieve the Golden Fleece, hoping that Jason would not return alive.
The Golden Fleece was a prized possession that was said to have magical powers. By sending Jason after it, Pelias hoped that he would be rid of Jason and also gain the favor of the gods by obtaining the Golden Fleece.
Ultimately, Jason was successful in his quest and returned with the Golden Fleece, which led to further adventures and his eventual rise to power.