Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: Respiratory acidosis is considered to be problematic because excess co2 in blood.

A: Why is respiratory acidosis considered to be problematic?
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Q: Learning to get used to something after being exposed to it for a while is associated with habituation learning.

A: Learning to get used to something after being exposed to it for a while is associated with what kind of learning?
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Q: Star, solar system, galaxy, universe of the following correctly lists the structures in space from smallest to largest.

A:
Which of the following correctly lists the structures in space from smallest to largest?
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