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Sirius is a star with spectral type A and Rigel is a star with spectral type B. What can we conclude?
Evolution
A scientific theory that explains the diversity of life on Earth through processes such as natural selection and genetic variation.
Development
The process of economic and social transformation that is based on complex cultural and environmental factors and their interactions.
African-American Southerners
This term refers to individuals of African descent living in the Southern region of the United States, historically impacted by slavery and segregation.
Slavery
An arrangement where persons are held by others, stripped of their individual freedom, and obligated to engage in labor or services.
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