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.

Q: The essay on DNA structures was read more than the one on Proteins, so the one on _ must be more dull.

A: Proteins
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Q: Since it was a beautiful day, his friend invited him to the park to play frisbee. The _ was flying.

A: frisbee
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Q: Eve found that the plants in the greenhouse thrived through the frost while the ones in the garden died, because the _ was warmer.

A:
greenhouse
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