Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.
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Question: Fact: soil contains nutrients for plants

Answer: plants gather their nutrients from the?


Question: Fact: condensation is a stage in the water cycle process

Answer: Fogged up glass on a store window is a stage in the?


Question: Fact: if an object reflects light toward the eye then that object can be seen

Answer:
Which of these things is absolutely required in order to notice a bat flying towards you?