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

[Q]: Bacteria is usually the prey of a protist.
[A]: What is usually the prey of a protist?


[Q]: Fermat’s principle states that light will always take the path of the least amount of time.
[A]: Fermat’s principle states that light will always take the path of least amount of?


[Q]: A frog develops (a/an) lungs as it changes from a tadpole to an adult frog.
[A]:
Which of the following structures does a frog develop as it changes from a tadpole to an adult frog?