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

Input: Consider Input: One gram of sugar or starch provides 4 calories of energy.

Output: How many calories of energy does one gram of sugar or starch provide?


Input: Consider Input: A fewer predators is most likely to cause the number of rabbits living in an area to increase.

Output: Which factor is most likely to cause the number of rabbits living in an area to increase?


Input: Consider Input: The pupil of the eye allows light to enter.
Output: What part of the eye allows light to enter?