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.
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Question: I was listening to some music while swimming with my phone and headphone but the headphone later stopped working. The _ is waterproof.

Answer: phone


Question: The crab fled the filthy water for the fresh seaweed.  The _ made him as happy as a crab could be.

Answer: seaweed


Question: Braces are a much better option than dentures because the _ only replace your teeth.

Answer:
dentures