Answer:
American Civil War - War between the Union Army of the United States and the Confederate Army of the South.
Slavery - Taking away freedom and making people work with no rights.
Underground Railroad - Network of secret routes that allowed slaves to escape to the north .
Thomas Edison - Inventor of the phonograph.
Explanation:
Louis armstrong is known for his scatsmo
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Organ systems. Organs are grouped into organ systems, in which they work together to carry out a particular function for the organism. For example, the heart and the blood vessels make up the cardiovascular system
