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

[Q]: Matter that mechanical wave energy can only travel through is medium.
[A]: What is the name of matter that mechanical wave energy can only travel through?


[Q]: Some viruses carry a few viral enzyme molecules within their capsids.
[A]: Some viruses carry a few viral enzyme molecules within their what?


[Q]: Cloudy conditions will most likely result from a low-pressure weather system.
[A]:
Which will most likely result from a low-pressure weather system?