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: Machines can cause objects to change shape. 
Question: What can cause objects to change shape?

Answer: Machines.


Question: Fact: infection can cause inflammation. 
Question: _can cause inflammation?

Answer: Infection.


Question: Fact: tiny crustaceans can feed on phytoplankton. 
Question: What can feed on phytoplankton?

Answer:
tiny crustaceans.