Final answer:
Most routes of the Underground Railroad ran through the free state of Ohio, providing a vital passage for enslaved individuals seeking freedom in the North.
Step-by-step explanation:
Through the free state of Ohio, most of the routes of the Underground Railroad ran. This network of paths was integral to aiding enslaved people escape to freedom in the Northern states and Canada, with Ohio playing a significant role due to its geographical proximity to slave states like Maryland, Virginia, Kentucky, and Missouri. This network included safe houses and supportive individuals who helped guide freedom seekers on their perilous journey north.