Most invertebrates have a more complex nervous system, and invertebrates are animals without a backbone. Given these facts, most animals without a backbone have what among the following options:
- epidermis and dermis
 - Leptospirosis
 - Veins and arteries.
 - death and devastation
 - scarce resources
 - barks and snarls
 - decreases its bodily water
 - Complex nervous systems


 

        Complex nervous systems 