Answer:
D). The natural imagery is developed throughout to indicate that nature continues long after humans do.
Step-by-step explanation:
The poem "The Tide Rises, The Tide Falls" by Henry Wadsworth Longfellow portrays the dark reality(relating to mortality) of human life. He uses the rise and fall of tides to symbolize the eternity of nature in contrast to the defined journey of humans. The theme of the poem develops throughout the poem with the natural imagery indicating the never-ending(eternal) existence of nature on earth which is contrary to the mortal and finite journey of human beings. Thus, option D correctly displays the exploration of the theme throughout the poem.