I.choose the correct answer in each number.

Answer:
1. C. They have segmented bodies and jointed legs.
2. D. To protect their soft bodies.
3. D. Sea anemones
4. B. Have no backbone
5. B. Sand dollar, starfish and sea urchins
6. C. Arachnids
7. B. Echinoderms
8. A. Sponges