What does the keystone do?
A. Supports the downward and outward thrust of the rounded arch
B. Is a decorative element of the rounded arch
C. Is necessary for a door in a rounded arch
D. Supports the weight of the rounded arch

In one to two paragraphs, explain how changing context and interpretation have influenced viewpoints of dorothea lange’s portrait "migrant mother.” in your analysis, be sure to include the photograph’s meaning amid changing social, economic, and political climates, as well as the photograph’s value to photojournalism. include supporting evidence in the form of details, statistics, facts, or quotations.