Final answer:
Annelids and Arthropods share traits such as cephalization, segmentation, and diffusion across the body surface for gas exchange. The correct option is 2) cephalization 4) segmentation and 5) diffusion across body surface
Step-by-step explanation:
The traits that Annelids and Arthropods have in common include cephalization, segmentation, and the capability for diffusion across the body surface for gas exchange.
Both Annelids, such as earthworms, and Arthropods, like insects and arachnids, exhibit cephalization, which is the concentration of sensory organs and nerve cells at the front end of the body. Segmentation is evident in both phyla as their bodies are divided into multiple sections internally and externally.
Lastly, while Arthropods generally use specialized structures for respiration, they do possess the ability for diffusion across somebody surfaces, particularly in their early developmental stages, and Annelids achieve gas exchange across their moist body surface. The correct option is 2) cephalization 4) segmentation and 5) diffusion across body surface