Answer: When light is put away -As when the Neighbor holds the Lamp -To witness her Goodbye
Step-by-step explanation:
When the light goes away is being compared to when the neighbor holds the to goodbye. We know this because in the line where it said when the light is put away the next line starts with the word as. A simile uses the words like or as to compare things, which means that lines 2-4 is the simile.