The statement that best describes the effect of the imagery in the quotation "all ... who tread a dangerous maze in the darkness from the cradle to the grave" at the end of Paragraph 3 is:
c It illustrates how difficult and unpredictable life can be for anyone, which helps the reader relate to the speech.
This option captures the essence of the imagery, emphasizing the universal struggles and challenges faced by individuals throughout their lives, aligning with Darrow's broader argument about the influence of circumstances on behavior.