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

[EX Q]: Activities that can reduce the effects of edema condition include exercises to keep the blood and lymph flowing through affected areas.
[EX A]: Activities that can reduce the effects of what condition include exercises to keep the blood and lymph flowing through affected areas?

[EX Q]: A visual "copy" of an object that is formed by reflected or refracted light is called image.
[EX A]: A visual "copy" of an object that is formed by reflected or refracted light is called what?

[EX Q]: Some compounds form rigid frameworks called crystals.
[EX A]:
Some compounds form rigid frameworks called what?