How does the structure of state governments compare to the federal government?

Which of the following best describes the relationship between the united states and south korea today?

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

Could anything have been done through compromise to stop it, or did it have to happen?