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]: John dusted the furniture in his room with a towel and it got the _ dirty.
[EX A]: towel

[EX Q]: The hospital bill affected my credit score negatively, but the insurance bill did not. That's because I paid the _ on time.
[EX A]: insurance bill

[EX Q]: As the animals disliked the _ , the rocks were removed from the terrarium and replaced with plants.
[EX A]:
rocks