Final answer:
The correct answer to the student's question is 'sorrowful,' as the quoted texts and the provided passage both suggest a somber and bleak environment.
Step-by-step explanation:
The passage given suggests a somber and sorrowful atmosphere, matching the choices provided. The mention of activities like mourning, melancholy notes, and wailing implies a mood that is the opposite of cheerful. The correct answer to the question, 'The lugubrious wails of the gypsies matched the dreary whistling of the wind in the all-but-deserted cemetery,' is sorrowful. This mood is similarly conveyed in the quoted texts where words like 'deadly stillness', 'moan', and 'desolate' further emphasize a sorrowful and bleak environment.