A. For piercing and sucking (e.g., leeches, mosquitoes).B. For sucking only (e.g., many flies, butterflies).C. For absorption through surface of body (e.g., various invertebrates feeding on decaying organic matter, internal parasites such as tapeworms, which lack a digestive tract).A different classification, often used, rests on the nature of the behaviour for procuring food:A. Filter feeders str