<span>evidence of shared ancestry with flying birds</span>
I think the answer is B but I could be wronged
I believe you mean legs. If you do, the answer you are looking for is: All spiders have eight legs. They also have two small appendages at the front that are modified legs; these are called pedipalps.
The word exoskeleton means “outside skeleton.” Many invertebrates, or animals without backbones, have exoskeletons. Insects are the largest group of animals that have an exoskeleton. ... The exoskeletons of crabs, lobsters, shrimp, spiders, ticks, mites, scorpions, and related animals are also made of chitin. Hope I helped! ☺