Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Fact: pesticides can harm animals. 
Question: What can harm animals?
Solution: pesticides.
Reason: The answer is present in the span of the fact.

Now, solve this instance: Fact: Two lenses to produce magnified images allow for detailed observation of celestial objects. 
Question: Two lenses to produce magnified images allow for detailed observation of what objects?
Student:
celestial.