At times, the Moon appears low in the sky just over the tops of buildings and trees. At other times, the Moon is high overhead. Which of the following explains why the Moon appears low in the sky at some times and higher in the sky at others?

Which source would best a historian understand the effect of the great chicago fire on families? a. a biography of a chicago family displaced by the fire b. a letter from a grandmother in new york to her family in chicago c. a newspaper editorial about families who were displaced d. an oral history dictated by an adolescent who fled the fire