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: Learned behavior is adaptive because they are flexible, capable of changing if the environment changes.

Answer: What kind of behaviors are adaptive because they are flexible, capable of changing if the environment changes?


Question: When light passes from one medium to another, it changes speed.

Answer: When light passes from one medium to another, it changes what?


Question: There are three quarks in each proton and neutron.

Answer:
How many quarks are in each proton and neutron?