Concept:A good layer is a hen with physical features that indicate strong egg-laying ability.Explanation:In poultry, a good layer typically has a bright red comb and wattle, bright and bulging eyes, and a broad and flexible pelvic bone.These signs show good health and active egg production.A long and curve beak is not connected to egg production.Beak shape does not affect the hen's ability to lay eggs.Therefore, it is not a characteristic of a good layer.Answer:D. Long and curve beak