What is the effect of the epistolary (letter) format of the memoir? To whom is Coates writing? Why? Based on “Between the World and Me”.

The question below refers to the selection “ozymandias” by percy bysshe shelley. the traveler seems to believe that — a. monuments are eternal b. the passage of time is necessary and inevitable c. we must preserve relics of past civilizations d. even the greatest works are destroyed by time