instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Atp or adenozine triphosphate is used for most energy functions in organisms.
answer:
What molecule is used for most energy functions in organisms?

question:
The brain is the most complex organ in the human body.
answer:
What is the most complex organ in the human body?

question:
Most of the earth's freshwater is in the form of frozen.
answer:
In what form is most of the earth's freshwater?