Concept:A pest of honeybee is an animal that attacks honeybees, steals their food, or weakens the bee colony.Explanation:Birds such as bee-eaters are common in apiaries because they feed directly on adult honeybees.This makes the bird a true pest of honeybee among the options given.Grasshoppers feed on plants and are mainly crop pests, not hive pests.Ticks usually attack livestock and do not normally harm honeybees.Therefore, the most correct option in this case is the bird.Answer:A. bird