Final answer:
Frederick Douglass emerged as an abolitionist leader through his powerful speaking skills and his autobiography. He captivated audiences with his public lectures, published a widely read autobiography, and gained support for the antislavery movement.
Step-by-step explanation:
Frederick Douglass emerged as an abolitionist leader through his powerful speaking skills and his autobiography. After escaping from slavery, Douglass began to provide public lectures on slavery, capturing the attention of prominent abolitionists.
In 1845, he published his autobiography, 'Narrative of the Life of Frederick Douglass', which became widely read and contributed significantly to rousing morale among weary abolitionists. Douglass also traveled to Great Britain, where he met with British abolitionists and drummed up support for the antislavery movement.