Question

where did most routes on the underground railroad lead?
to canada
. to mexico
to western territories
to the caribbean islands

Explanation:

The Underground Railroad was a network for enslaved people to escape enslavement in the U.S. Canada was the primary destination because it had abolished slavery, offering permanent freedom, unlike U.S. western territories (where slavery could expand) or other listed regions which were far less common targets for most escape routes.

Answer:

to Canada