Final answer:
In the context of the sentence, 'resignation' denotes the acceptance of a difficult situation without any protest or emotional response.
Step-by-step explanation:
In the provided sentence, 'Now,' said the demon, 'in a voice that carried with it no sorrow, no relish, only a dreadful flat resignation, 'you will be tortured,' the word resignation means (a) Acceptance of a difficult situation without protest. The word is conveying a sense of giving up, a lack of emotional response to a negative situation which the demon announces in a matter-of-fact way, indicating that there is no use in fighting or lamenting over what is about to happen.