What feature did you use to classify the rabbit and millipede into these groups?

To classify the rabbit and millipede into distinct groups, I used their biological characteristics such as body structure and classification systems. Rabbits are mammals, characterized by features like warm-bloodedness, fur, and live birth, while millipedes belong to the arthropod phylum, exhibiting segmented bodies and exoskeletons. These fundamental differences in anatomy and physiology are key features that define their respective classifications.