TASK DEFINITION: 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.
PROBLEM: Cutting the wood with the chainsaw proved to be more difficult than the hand saw since the _ 's blades were dull.

SOLUTION: chainsaw

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

SOLUTION: phone

PROBLEM: Steve had trouble making the alimony payments with his salary because the _ was too high.

SOLUTION:
alimony