<h3>I think it's answer (c) I hope you are satisfied with my answer </h3>
The three main worm phyla are flatworms, roundworms, and segmented worms. Roundworms have a digestive tube that has two openings. Segmented worms have a closed circulatory system in which blood is enclosed in blood vessels. These are important steps in the evolutionary development of animals.
Carbon is released by all except <u>precipitation</u><u>.</u>
Electrons man. I think. Nah, I pretty sure....
