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: A bill is used for catching prey by some birds. 
Question: What is used by some birds to catch their prey?

SOLUTION: a bill.

PROBLEM: Fact: protective plates over the ends of the fingers become more brittle with age. 
Question: What do fingers have over the ends that become more brittle with age?

SOLUTION: protective plates.

PROBLEM: Fact: sponges eat krill and plankton. 
Question: what eats krill and plankton?

SOLUTION:
sponges.