instruction:
Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.
question:
Fact: navigation requires knowing which way to go. 
Question: What requires knowing which way to go?
answer:
navigation.


question:
Fact: Alternation of generations allows for creating young by asexual and sexual means. 
Question: What allows for an organism to create young by sexual and asexual means?
answer:
alternation of generations.


question:
Fact: Heating a liquid can cause gas bubbles to burst. 
Question: Heating a liquid can cause what?
answer:

gas bubbles to burst.