Flatworms (apart from the turbellarians, (planarians are in the class turbellaria)) are parasitic and don't need complex nervous systems. A parasitic animal devotes much of itself to reproduction and doesn't worry about other tasks. Cestodes don't even have a gut, they absorb food via diffusion through their skin. Annelids are free-living animals, and they need to move around more. They don't spend their adult life hooked to the inside of an animal, they move around, and need a more complex nervous system to give them a better view of their world.
<h2><u>
PLEASE MARK BRAINLIEST!</u></h2>
Answer:
D) Mosquito
Explanation:
The predators hunt and eat prey. In this case, if the grass carp increase, they will eat more mosquitoes.
<h3>Your answer is D) Mosquito</h3>
I hope this helps!
- sincerelynini
