The second set of lines is the answer.
In literature as well as in art, there are many natural elements such as the sun, the stars, the flowers, etc. that are used symbolically and also to beautify the imagery.
In the case of both the sunrise and sunset, we can understand that these represent a cycle, the beginning and the end of something or somebody.
Thus, in the case of "Because I Could Not Stop for Death", the image of the setting sun is not described in great detail because the context of the poem gives us the idea of a cycle that ends, that is to say death, and death itself does not require much description.
Because if you never grow up you'll never be treated like a grown up
inform the reader of Mrs. Flowers’s social position in Black Stamps.
direct quotations
Direct quotations come directly from the text you are analyzing. They are the best choice when it comes to proving your thesis statement because they come directly from the source. The thesis statement is the topic sentence for the essay. The textual evidence should be used to support the thesis statement. The author's biography and a summary of the plot may not be useful at all depending on the thesis statement. Paraphrasing the text can be considered evidence, but not textual evidence since it is not specifically from the text.