Answer:
a. He uses alliteration to link images of night and sleep.
Step-by-step explanation:
Alliteration is the continuous use of the same alphabet or letter in close quarters, or right next to each other. This occurrence of the same letter or sound in a sentence gives the flow of rhythm or sound of the sentence a continuous flow of the same consonant words. eg, lightning lights the lane.
In the same vein, Edgar Allen Poe's poem "Serenade" uses a lot of alliterative effects on the words. One example is the lines
"And earth, and stars, and sea, and sky Are redolent of sleep, as I."
In his description of the beauty of the night and the calmness and tranquility of the sea, he uses words which begins with the same consonant sounding letters "s"- stars, sea, sky, sleep. This continuous flow of the 's' word in a sentence is known as alliteration.