The correct answer is B. The beach at dawn
Step-by-step explanation:
In literature, including poems, the setting is the context in which the events described take place including the time (historical period, time of the day, time of the year ), the geographical conditions (weather, location) and other related to the social context. This context is usually directly presented by the author or narrator or implicitly introduced as part of the description or linked to the characters or other literary elements. Int he case presented the author include phrases such as "The first light of the morning" and "shined on the sand as the waves rolled in" that suggest the setting in terms of time is the dawn as the first light of the morning is when the day begins called daybreak, sunrise or dawn. On the other hand, the presence of the words "sand" and "waves" suggest the place (geographical conditions) in which the events take place is the beach as this is the common place where one can fin sand and waves together. Thus, the sentence that best describes the poem's setting is "the beach at dawn".