question: What plays a significant role in freshwater and marine environments?
choices.text: calcium macaws sharks Algae roots Gecko energy moles
choices.label: A B C D E F G H
formatted_question: What plays a significant role in freshwater and marine environments? (A) calcium (B) macaws (C) sharks (D) Algae (E) roots (F) Gecko (G) energy (H) moles