The myth of Demeter and Persephone in Greek mythology explains the phenomenon of seasonal change. Demeter, the goddess of agriculture, grieves during Persephone's time in the Underworld, correlating with the fall and winter months when the earth is barren. When Persephone returns, it signifies spring and summer's arrival, illustrating themes of life and rebirth. This connection highlights the cyclical nature of growth and fertility tied to human experience and agricultural practices.