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

Q: The majority of arthropods live on land.

A: Where do the majority of arthropods live?
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Q: Producers in an ecosystem generally get their energy from the sun.

A: Where do producers in an ecosystem generally get their energy from?
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Q: Poles parts of the planet does solar energy have difficulty reaching.

A:
What parts of the planet does solar energy have difficulty reaching?
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