“edge” is one of the last poems plath wrote before her suicide. how does knowing this information affect your understanding of the poem?

You can see how depressed that she feels when conveying this message and you can almost see what she is planning to do.  It makes you more aware of others who may be in need of help when you least realize it. 

Where is the visual?

The answer is actually b. explanation: lines that signify human-like characteristics: “a half a dozen kissed the eves”raindrops don’t usually ‘kiss’ anything, as it is a human action. lines that signify playfulness: “and made the gables laugh” a gable is the part of a wall that encloses a pitched roof, so it is certainly not living and cannot really laugh. this is a human characteristic and signifies playfulness.