She does not know, she probably was frantic with worry that her daughter had been either killed (as some goddesses and gods do die in Greek myth) or that she'd been stolen away (which she was) and in great danger (which she was not).
Hecate who heard the cry and led Demeter to Helios, and then led Demeter into the Underworld to Hades and Persephone.
Demeter discovered what happened to her daughter, Persephone, when she learned from Hecate, the goddess of magic and witchcraft, that Persephone had been taken by Hades to the Underworld. Hecate guided Demeter to Helios, the sun god, who revealed the truth about Persephone's abduction. Heartbroken and enraged, Demeter searched for her daughter, leading her to neglect the earth and cause a great famine until she was reunited with Persephone.
Demeter stopped giving the ground water and soil then Zeus arrange persephone's visits
Helios, the sun god. He sees everything happen and when Demeter goes to look for Persephone, Helios tells her what happened
Persephone was Demeter's daghter, so when hades kidnapped her, of course Demeter wanted her back. Eventually, the time Persephone spent with Demeter and the time with Hades was divided. When Persephone was with Hades, it was Winter. When she was with Demeter, it was Summer.
Persephone's parents are Zeus and Demeter.
Demeter adores Persephone because persephone is her daughter and the official start of spring
Because Persephone was Demeter daughter or sister
Because Persephone was Demeter's only daughter
she thinks she got lost or died in the woods she was always playing in. Demeter makes the word infertile because Hades take Persephone and tricked her to become his wife, and stay with him for 4 or 5 months out of the year which caused winter.
Demeter and Persephone were both goddesses of the earth. Gaia (Earth) through her daughter Rhea, who was the mother of Demeter and grandmother of Persephone.
Demeter is Persephone's mother.