There are three main types of symbiotic relationships: mutualism, commensalism, and parasitism. Which statement depicts commensalism? Defend your choice 1. The tick derives benefit while the dog is harmed. 2. Only one animals, the remora benefits. The shark is not hurt or helped. 3. The mosquito sucks the blood from warm-blooded animals and possibly transmits disease. 4. The elephants supply a food source by allowing the birds to eat parasites and other bugs from their skin.