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

Q: Surface tension is responsible for the fact that small insects can walk on water.

A: Surface tension is responsible for the fact that small insects can do this on water?
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Q: Atoms of metals are good conductors of electricity because they give up electrons.

A: Why are atoms of metals good conductors of electricity?
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Q: Animals produce most of enzymes chemicals, which are needed to synthesize the fatty acids they need.

A:
Animals produce most of what chemicals, which are needed to synthesize the fatty acids they need?
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