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

Q: Landslides moving loose rocks downhill process is the best example of a sudden change to earth's surface.

A: Which process is the best example of a sudden change to Earth's surface?
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Q: Prokaryotes group of simple organisms recycles nutrients and has been on earth since long before multicellular life appeared.

A: What group of simple organisms recycles nutrients and has been on earth since long before multicellular life appeared?
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Q: Some species of fish carry their fertilized eggs in their mouth until they hatch; this is called mouth brooding.

A:
Some species of fish carry their fertilized eggs in their mouth until they hatch; this is called what?
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