Answer:
Best Option: (D) Squid
Explanation:
Each of these animals has a shell. The cuttlefish, Nudibranch and Nautilus all have shells on the outside of their bodies. The squid does not have a shell on the outside of their body, but it has an internal shell. This is called a pen.
Each of these animals has a shell, but the only one that has an internal shell is the squid.
