Final answer:
The phrases 'hour', 'dark realities', and 'dark days' represent 'Moments of time, harsh truths, difficult times' which connote specific periods, unpleasant truths, and challenging situations, respectively, in literature.
Step-by-step explanation:
From the selection given, the phrases hour, dark realities, and dark days most closely mean 'Moments of time, harsh truths, difficult times.' These metaphorical expressions are commonly used in literature to express figurative rather than literal meanings.
The hour often alludes to a specific moment or period in time. Dark realities are synonymous with 'harsh truths' or unpleasant facts of life that are often difficult to accept or face. Lastly, dark days is a metaphorical term referring to 'difficult times,' which could be periods of sadness, despair, or challenging situations.
These phrases are found across various passages where the context suggests difficulty, moments of revelation, or acknowledgement of the harsher aspects of realities.