Final Answer:
Annelids have a Segmented body so the correct option is B.
Step-by-step explanation:
Annelids, such as earthworms and leeches, are characterized by a segmented body, making option (b) correct. Each segment, or metamere, is marked by a distinct repetition of body parts, including muscles, nerves, and excretory structures. This segmentation is a key characteristic that sets annelids apart from other invertebrates.
The segmentation allows for flexibility and efficient movement, as well as specialization of body functions in different segments. While annelids do not have an exoskeleton (option a), which is a feature of arthropods, or a mantle (option c), which is typical of mollusks, they also lack a radula (option d), a rasping tongue-like structure found in certain mollusks like snails and slugs.