To help rule the Underworld and create Springtime.
Spring/Queen of the Underworld/Elysium/Necromancy/Ghosts/ Erinyes/Curses
There was no summer or winter until Persephone had been abducted to the underworld. Her absence made Demeter neglect her duties and nothing grew (= winter).
Hades abducted Persephone, Demeter her mother went in search of her and her duties were neglected and humans started to starve, then Demeter learned where Persephone was and demanded her daughter back and Zeus agreed so long as Persephone had not eaten or drank anything while in the Underworld, but she had; so Persephone spends half the year above the earth with her mother and half below with Hades her husband.
The kidnapping of her daughter, Persephone; by Hades, and permitted by Zeus.
Persephone was abducted by Hades and taken to the underworld, causing her mother Demeter great distress. Demeter's grief led her to neglect her duties as the goddess of agriculture, resulting in a barren earth.
It isn't really Demeter who saves Persephone, but Zeus. After Persephone is abducted by Hades, Demeter (the goddess of the harvest, and mother of Persephone), begins to neglect her duties. Humans begin to go hungry, so Zeus sends Hermes to the underworld, to talk to Hades. (Hades gives Persephone back, but she has eaten in the underworld and must return for a period each year. This myth explains the winter.)
It isn't really Demeter who saves Persephone, but Zeus. After Persephone is abducted by Hades, Demeter (the goddess of the harvest, and mother of Persephone), begins to neglect her duties. Humans begin to go hungry, so Zeus sends Hermes to the underworld, to talk to Hades. (Hades gives Persephone back, but she has eaten in the underworld and must return for a period each year. This myth explains the winter.)
Demeter neglects her duties as goddess of the harvest because she is consumed by grief over the abduction of her daughter Persephone by Hades. Demeter's sorrow and anger cause her to withdraw her powers, leading to the withering of the crops and a famine. She only agrees to resume her duties when Persephone is allowed to return to the surface for part of the year.
Persephone is responsible for guiding and overseeing the transition of souls from the world of the living to the underworld. Additionally, she is associated with the changing of the seasons as her time spent in the underworld corresponds with winter.
When Demeter could not find Persephone, she grieved deeply and went searching for her daughter all over the world. During this time, the Earth became barren as Demeter neglected her duties as the goddess of agriculture. This led to a famine until Zeus intervened and negotiated for Persephone to return for part of the year, bringing about the cycle of the seasons.
The inciting incident in the story of Persephone and Demeter occurs when Hades, the god of the underworld, abducts Persephone while she is picking flowers in a meadow. This act of kidnapping causes Demeter, Persephone's mother and the goddess of agriculture, to fall into deep grief and abandon her duties, leading to the barren winter months. Demeter's search for her daughter sets off a series of events that ultimately affect the fertility of the earth and the cycle of the seasons.
Hades (Demeter's Brother) sees her Demeter's daughter, Persephone and he abducts her and marries her. Demeter doesnt know where her daughter has gone and searches for her. Thus during her intense search she neglects her duties as goddess of the harvest.