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: dropping an object into water causes vibrations in the water

Answer: Stepping in a lake causes?


Question: Fact: studying a soil sample means studying the microorganisms in that soil

Answer: studying a soil sample means studying the microorganisms in the?


Question: Fact: farming cause nutrients in the soil to decrease

Answer:
a soil in a village seems to be nutrient deficient, what might have happened?