Option 1 -> "Veritable" means genuine or true; "veritable feast" is an idiomatic expression emphasizing something is truly impressive.
Option 2 -> "Hopeful" means optimistic, which doesn't logically pair with "feast to the eye" in this context.
Option 3 -> "Delicious" relates to taste, not visual beauty, making it inappropriate for describing something seen.
Option 4 -> "Deceptive" means misleading, which contradicts the positive description of the concert hall's interior.
Hence, Option 1: veritable -> "A veritable feast to the eye" is a common idiomatic expression used to emphasize that something is genuinely and remarkably beautiful or visually impressive. The word "veritable" intensifies the metaphor of the visual "feast." -> correct