Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Q: Fact: offspring receive genes from their parents through DNA

A: Offspring receive genes from their parents via what?
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Q: Fact: a complete electrical circuit is a source of electrical energy

A: Which is a complete circuit?
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Q: Fact: smoking causes direct damage to the lungs

A:
Smoking causes direct damage to what?
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