Which work of John Keats is dedicated to Thomas Chatterton?

The correct answer is Endymion.

Explanation:
John Keats's major narrative poem, Endymion: A Poetic Romance, published in 1818, is dedicated to the memory of the young poet Thomas Chatterton. Keats prefaced the poem with the inscription: "Inscribed to the memory of Thomas Chatterton."

Thomas Chatterton was a late 18th-century English poet who died by suicide at the age of 17. He became a symbol of the tragic, neglected genius for the Romantic generation. Keats greatly admired Chatterton's literary talent, purity of language, and artistic spirit, prompting him to dedicate one of his most ambitious early works to his memory.