The group of insects that have mouth parts adapted for both piercing and sucking is
Answer Details
The correct answer is: mosquitoes, tse-tse flies and aphids.
These three types of insects have specialized mouthparts called proboscis that are adapted for both piercing and sucking. The proboscis is a long, tubular structure that is used to pierce the skin of a plant or animal and then suck up the fluids inside. Mosquitoes use their proboscis to feed on the blood of animals, while tse-tse flies use theirs to feed on the blood of mammals. Aphids use their proboscis to feed on plant sap.