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

[Q]: Producers in an ecosystem generally get their energy from the sun.
[A]: Where do producers in an ecosystem generally get their energy from?


[Q]: Force times distance is the equation for work.
[A]: Force times distance is the equation for what?


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