Final answer:
The girl kidnapped in the Homeric Hymn to Demeter is Persephone. Her abduction by Hades and the subsequent search conducted by her mother, Demeter, form the central narrative of the myth, which is deeply tied to the Eleusinian Mysteries and the changing of the seasons.
Step-by-step explanation:
The name of the girl who is kidnapped in the Homeric Hymn to Demeter is Persephone. This myth recounts how Hades abducts Persephone, and her mother, Demeter, roams the earth in search of her daughter. The story describes the effects of Persephone's abduction on Demeter, who is responsible for the fertility of the earth, leading to a barren landscape while she is grieving. Upon Persephone's return, Demeter's joy restores the earth's fertility, symbolizing the cycle of life and seasons. This myth held great importance in ancient Greece, particularly in connection with the Eleusinian Mysteries, an annual initiation ceremony at the sanctuary of Demeter and Persephone in Eleusis.