question: What is essential for all life on Earth?
choices.text: tools calcium carbonate ice hydration of cells gasoline evolution eating balanced meals electricity
choices.label: A B C D E F G H
formatted_question: What is essential for all life on Earth? (A) tools (B) calcium carbonate (C) ice (D) hydration of cells (E) gasoline (F) evolution (G) eating balanced meals (H) electricity