question: Write a question you would see in a school textbook.
answer: Two populations of reef fish live in biological coexistence with each other. Which sentence best describes their relationship?

question: Write a question you would see in a school textbook.
answer: If 10 grams of water are added to 5 grams of salt, how much salt water will be made?

question: Write a question you would see in a school textbook.
answer:
What do cells break down to produce energy?