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

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?

Example Input: The sun is considered the center of the solar system.
Example Output: What is considered the center of the solar system?

Example Input: Excessive bending stress usually causes fractures on a bone.
Example Output:
What usually causes fractures on a bone?