Answer the following question: You are presented with the question "what have a unique water vascular system with tube feet?" and the following answer choices: - h2o - insects - sea urchins - bushes - Most plants - Conifers - orchids - humans Now knowing that echinoderms have a unique water vascular system with tube feet and starfish and sea urchins are also echinoderms, choose the best answer.
Answer:
sea urchins