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]: I avoided the live wire but not the fence it ran along because the _ was safe to touch.
[EX A]: fence

[EX Q]: The essay on microbiology was more interesting than the one written on statistics. _ must be an interesting subject.
[EX A]: microbiology

[EX Q]: The pneumonia got into her lung but not into her throat, because the _ was more vulnerable.
[EX A]:
lung