Answer:
And when white moths were on the wing.
Step-by-step explanation:
In poetry, emphasis can be simply understood as certain words or phrases that has stress or carries weight to grasp the readers' attention.
In the poem "The Song of Wandering Aengus" by William Butler Yeast, the lines "And when white moths were on the wing" were said with emphasis when read aloud. This is because the poet used a lot of alliterations in the line by putting words like 'when', 'white', 'were' and 'wing'. Sometimes the poetic device of alliteration is used by poets to grab the attention of the readers. Thus, it becomes the emphasis of the poem when read aloud.