Answer:
Paragraph 1: The Underground Railroad was a network of hidden routes and safe houses. Slaves used it to escape their owners and enter Canada.
Paragraph 2: Harriet Tubman was a former slave who helped free other slaves using the Underground Railroad. During the Civil War, she operated as a scout, spy, soldier, and nurse for the Union Army.
Paragraph 3: Harriet Tubman acted as a conductor in the Underground Railroad. Over ten years, she made 19 trips into the South and guided over 300 slaves to freedom using the safe houses and secret paths in the Underground Railroad.