7. Describe Poe's idea of the "unity of effect" in your own words.

The unity of effect is supposedly a method that he used in his own writing. Put simply, it is determining what effect you would like to have on a reader and carrying that effect through all the elements of your story or poem. The effect on the reader is, essentially, the purpose of your piece.

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,

when and where the picture was taken