The correct answer is: b) wings
Explanation:
Arthropoda, which includes insects, arachnids, myriapods, and crustaceans, are a diverse group known for several key characteristics. They have an exoskeleton, jointed legs, and bilateral body symmetry. However, not all arthropods possess wings. In fact, many species, such as spiders and crustaceans, do not have wings at all.
While it is true that some arthropods, particularly certain insects, do have wings, the statement emphasizes that wings are not a universal trait of this phylum. Therefore, while wings can be found in specific groups within Arthropoda, it is not accurate to say that they are a defining characteristic of the entire phylum.