You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.

[EX Q]: The grip of the anvil cannot bend the iron bar because the _ is weak.
[EX A]: grip

[EX Q]: The cookies had a smoother texture than the brownies because the _ had walnuts in them.
[EX A]: brownies

[EX Q]: The sand and water in the fish tank were very dirty, so the _ needed to be filtered.
[EX A]:
water