Who was the goddess of the rainbow?

Iris is recognized as the goddess of the rainbow in Greek mythology. She was a personification of the rainbow and served as a messenger for the gods, particularly for Hera. Iris is often depicted as a beautiful young woman with wings, and she played a vital role in connecting the divine with humanity by carrying messages on the rainbow. Her association with rainbows also symbolizes hope and the connection between the earth and the celestial realm, further enhancing her significance in mythological narratives.

The other choices are notable figures in mythology but do not correspond to the goddess of the rainbow. Hebe is known as the goddess of youth and cupbearer to the gods, Demeter is associated with agriculture and fertility, and Selene is the moon goddess. Each of these deities represents different aspects of life and nature, but none are linked specifically to rainbows as Iris is.