Please answer the following question: You are presented with the question "What is an example of an animal that lacks a respiratory and excretory system?" and the following answer choices: - Dog - Human - alpacas - cacti - Starfish - Leeuwenhoek - Elephants - cows Now knowing that echinoderms lack respiratory and excretory systems and starfish and sea urchins are also echinoderms, choose the best answer.
Answer:
Starfish