Final answer:
The use of metaphor creates vivid imagery and adds emotional depth to the description.
Step-by-step explanation:
The use of metaphor in the lines has the effect of creating vivid imagery and adding emotional depth to the description. The metaphor of clocks sounding like a hammer hacking at the earth conveys a sense of destruction and finality, emphasizing the gravity of the situation. Additionally, the metaphor of the sound resembling a grave further enhances the somber and eerie atmosphere.
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