I just took a test in school today. What question was I asked?

Question I was asked: Scientists dig in a dry area at the bottom of a mountain range. Fossilized shells of freshwater mussels are found in the area. Which is a likely conclusion that scientists will draw based on this evidence?
Random question?

The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process?
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Question generated: Which is a distinction between an epidemic and a pandemic?
Problem: Write a question you would see in a school textbook.

Answer: Which instrument should a student use to best examine bacteria?
question: Write a question you would see in a school textbook. OPTIONS:
- a candle
- a mirror
- a flashlight
- a television
answer: In which object does chemical energy most likely transform into electrical energy?
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Question generated:
Amanda is learning about different adaptations of animals. Which is an example of a behavioral adaptation?