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

Q: Diffraction is the phenomenon in which light and sound waves become circular at the point source of a barrier.

A: What is the phenomenon in which light and sound waves become circular at the point source of a barrier?
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Q: Altricial organisms are helpless at birth and require lots of help from their parents.

A: What type of organisms are helpless at birth and require lots of help from their parents?
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Q: Troposphere part of the atmosphere do greenhouse gasses trap heat in.

A:
Which part of the atmosphere do greenhouse gasses trap heat in?
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