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

[Q]: Moving air masses is the main reason for weather change.
[A]: What is the main reason for weather change?


[Q]: Together, the muscular and skeletal organs are known as the musculoskeletal system.
[A]: Together, the muscular and skeletal organs are known as what?


[Q]: Pyramids of net production and biomass reflect low level of efficiency.
[A]:
Pyramids of net production and biomass reflect what level of efficiency?