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

Example Input: A electron microscope is used to see extremely small objects.
Example Output: What type of microscope is used to see extremely small objects?

Example Input: Eukaryotic cell division involves mitosis and cytokinesis.
Example Output: Eukaryotic cell division involves mitosis and what?

Example Input: A fewer predators is most likely to cause the number of rabbits living in an area to increase.
Example Output:
Which factor is most likely to cause the number of rabbits living in an area to increase?