Answer: noisy partying.
Revelry refers to a lively, boisterous celebration. In this case, the option that most closely resembles this meaning is "noisy partying." Moreover, if we did not know the exact meaning of the word, we could still guess from the context of the sentence. The narrator tells us that the woman was too tired to participate in the revelry. Therefore, it is likely that revelry refers to something that requires a lot of energy.
