Concept:Piercing and sucking insect pests have a specialized tube-like mouthpart used to pierce tissues and suck fluids.
Explanation:Insects such as aphids, mosquitoes, and bedbugs feed on plant sap or blood.
They do not chew their food, so mouthparts like maxillae, mandibles, and labrums are not the main feeding structures.
Instead, they possess a long, slender proboscis that can pierce the surface of the host.
Through this proboscis, saliva is injected and fluids are sucked out.
Therefore, piercing and sucking insect pests possess probosces.
Answer:D. Probosces