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

[Q]: An excellent solvent that holds heat well and allows hydrogen bonds, water substance has many properties critical to life.
[A]: An excellent solvent that holds heat well and allows hydrogen bonds, what substance has many properties critical to life?


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


[Q]: Heterogeneous is the term for a mixture that varies in its composition.
[A]:
What is the term for a mixture that varies in its composition?