What happened to the underground railroad after the fugitive slave act was passed? it became less effective. it grew and became busier. it was shut down by slave hunters. it was shut down by the federal government.

After the Fugitive Slave Act was passed, the Underground Railroad grew and became busier.

Explanation:

The Underground Railroad was a clandestine network organized in the nineteenth century to help African-American slaves escape from the southern plantations to free states or Canada.

The Underground Railroad looked for its collaborators within the abolitionist movement, of which it was a part, and thus it continued to extend its activities always outside the law. It was especially important during the validity of the Fugitive Slave Act, helping the slaves not to be captured by the white supremacists of the southern states.

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.