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:
The answer among these works that features a flute with a delicate, "breathy" sound in a relatively high register is Concerto for Orchestra by Bela Bartok.
Answer: speed and velocity
