You are presented with the question "what creatures lack respiratory and excretory systems?" and the following answer choices: - Plant growth is reduced - marine and benthic - barnacles - epidermis and dermis - They may not survive. - kalenchoes - graptolites - movement of tectonic plates Now knowing that echinoderms lack respiratory and excretory systems and all echinoderms are marine and benthic, choose the best answer.
A:
marine and benthic