Question

How did Harriet Tubman become a conductor on the Underground Railroad?

Answer 1

Because of the Fugitive Slave Act it was dangerous for any Black person in most states not just the south. As a former slave she was deeply sympathetic to other slaves.

Explanation:

The underground railway got many former slaves not just to the North but to Canada. Free black men could be captured and forced into slavery by slave hunters. The Fugitive Slave Act was heavily biased against the blacks. Tubman a contact in a chain of contacts the guided former slaves to safe havens. She was known for her actions rather than her words.
https://en.wikipedia.org/wiki/Harriet_Tubman