TASK DEFINITION: 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.
PROBLEM: Fact: magnets are used to navigate oceans. 
Question: What are used to navigate oceans?

SOLUTION: magnets.

PROBLEM: Fact: Roots will decay is the conditions for growth aren't favorable. 
Question: What will decay is the conditions for growth aren't favorable?

SOLUTION: roots.

PROBLEM: Fact: Seeing requires photons. 
Question: What requires photons?

SOLUTION:
seeing.