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

[Q]: Water affects the availability of oxygen important element in aquatic environments and in flooded soils.
[A]: Water affects the availability of what important element in aquatic environments and in flooded soils?

[Q]: Mercury is not a solid even at room temperature.
[A]: Which metal is not a solid even at room temperature?

[Q]: Evaporation and condensation are similar because both are caused by changes in heat energy.
[A]:
In which way are evaporation and condensation similar?