Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: If the amount of force of that is applied is increased, it is easier happens to the work that a machine is producing.

Answer: If the amount of force of that is applied is increased, what happens to the work that a machine is producing?

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

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

Question: Two membranes form the mitochondrion structure of a cell.

Answer:
How many membranes form the mitochondrion structure of a cell?