Correct Option
Ticks and mites are classified under the class Arachnida, which belongs to the phylum Arthropoda. Arachnids are characterized by having four pairs of legs (eight legs), the absence of antennae, and a body typically divided into two main segments: a cephalothorax and an abdomen. Many ticks and mites are ectoparasites and are significant vectors in disease transmission.
Incorrect Options
Crustaceans (b) are primarily aquatic arthropods, including crabs, lobsters, and shrimp. They typically possess two pairs of antennae and a varying number of legs, usually more than eight, and their body structure differs significantly from ticks and mites.
Insects (c) belong to the class Insecta. They are characterized by having three pairs of legs (six legs), one pair of antennae, and a body segmented into three distinct parts: head, thorax, and abdomen. This morphology is distinct from that of ticks and mites.
Myriapods (d) comprise centipedes and millipedes. They are characterized by elongated bodies with numerous segments, each bearing one or two pairs of legs, which is a different body plan compared to ticks and mites.