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: Beavers cause ponds and lakes to form. 
Question: What can be the cause of lakes and ponds forming?
answer:
beavers.


question:
Fact: when a lake receives too much water, a flood occurs. 
Question: When does a flood occur in a lake?
answer:
after too much water received.


question:
Fact: Cells vary in size as well as shape and are seen with a microscope. 
Question: Cells vary in size as well as shape and are seen with what?
answer:

a microscope.