This looks like a new user that doesn't understand how our site works. It happens. They try and share their knowledge with the community (a good thing!), but are unsure exactly how to go about it.
It general cases, I wouldn't flag/vote to close straight away, but comment, and politely ask them to move the answer to the answer section. If, after a day or so with no response, I would post their answer as a Community Wiki answer, and edit it out of the question. Good content is still good content, and I would rather it be in a question/answer pair then closed and removed outright.
In this specific case however, the question itself seems too subjective to fit our site as it is currently written. A 'good' method to farm candies? According to what criteria? Amount of candies? Time/effort taken to farm? For this specific case, I would flag as Too Broad.