In Hesiod’s Theogony, Athena gives Pandora her clothing. The poem describes the gods contributing to Pandora’s appearance and abilities after Hephaestus forms her from earth.
Athena was associated with wisdom, warfare, handicraft, and especially weaving. Her role in dressing Pandora fits that wider mythological identity. Hesiod’s account also assigns other gifts to different deities, creating a composite portrait of a woman equipped and adorned by the gods.
This question concerns the Theogony specifically. Hesiod’s other major Pandora account, Works and Days, has a fuller narrative about her arrival among humans and the opening of the storage jar. The details of the gods’ contributions are not presented identically in every retelling.
Aphrodite is a common wrong answer because she is associated with beauty and desire, while Hera is associated with marriage and queenship. Neither is the goddess named for giving Pandora her clothing in this passage.