Concept:Insect mouthparts determine how they feed and the type of damage they cause to crops.Explanation:Grasshoppers possess strong mandibles that are specially adapted for biting and chewing plant tissues.Weevils have chewing mouthparts but are snout beetles, while aphids and cotton stainers have piercing-sucking mouthparts.Therefore, the insect-pest with biting and chewing mouthparts is the grasshopper.Answer:A. grasshopper