Final answer:
The organizational structure in the excerpt from "Hidden Figures" is Cause/effect, where events contribute to significant outcomes such as the enactment of Executive Order 8802 in response to protests and the inclusion of African Americans in the defense industry during WWII.
Step-by-step explanation:
The organizational structure used in the excerpt from "Hidden Figures" is Cause/effect. This structure is evidenced by the text presenting events and social pressures that led to significant outcomes and changes. For example, the protests over racial segregation led President Roosevelt to sign Executive Order 8802, prohibiting racial discrimination in national defense industry hiring practices. Additionally, the text describes the effect of the attack on Pearl Harbor on the involvement of the United States in World War II and, subsequently, how that led to African Americans with college degrees seeking employment in the federal defense industry, due to the opportunities it presented amid racial employment barriers elsewhere.