What was Demophoon known for in the context of Demeter's story?

Demophoon is known in the context of Demeter's story primarily for being made immortal. According to myth, Demeter, the goddess of the harvest and agriculture, found Demophoon and took him to her temple. She sought to make him immortal to ensure his safety and protect him from the suffering of mortal life. In her attempt, Demeter would place him in fire each night, intending to burn away his mortality. However, this act was interrupted, and as a result, he was not made fully immortal but was still blessed with a longer life.

The other options touch on various aspects of mythological narratives but do not specifically tie to Demophoon's direct significance in Demeter's story as clearly as his transformation related to immortality does.