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

[Q]: Fractional crystallization is the separation of compounds on the basis of their solubilities in a given solvent.
[A]: What is the separation of compounds on the basis of their solubilities in a given solvent?


[Q]: Circannual behavioral rhythms are linked to the yearly cycle of seasons.
[A]: What type of behavioral rhythms are linked to the yearly cycle of seasons?


[Q]: Autotrophs is another name for producers.
[A]:
What is another name for producers?