Demeter is the ancient Greek goddess of agriculture, grain, and fertility. She is best known for her role in the myth of her daughter, Persephone, whose abduction by Hades led to the changing seasons. Demeter's grief caused the earth to become barren, illustrating her deep connection to the cycles of nature. As the protector of the harvest, Demeter was revered by farmers and communities who relied on her blessings for a bountiful crop. Festivals such as the Thesmophoria were held in her honor, celebrating the fertility of the earth and the importance of agriculture in ancient Greek society.