Please answer the following question: You are presented with the question "what have more complex nervous systems" and the following answer choices: - animals without a backbone - the wearing away of rock - h2o - barks and snarls - plants - density - Veins and arteries. - remains of prehistoric life Now knowing that most invertebrates have a more complex nervous system and invertebrates are animals without a backbone, choose the best answer.
Answer:
animals without a backbone