Final answer:
Frederick Douglass's autobiography, Narrative of the Life of Frederick Douglass, An American Slave Written by Himself, was important to the movement to free slaves as it exposed the brutalities and rallied support for the abolitionist cause.
Step-by-step explanation:
Frederick Douglass's autobiography, Narrative of the Life of Frederick Douglass, An American Slave Written by Himself, is important to the movement to free slaves because it exposed the brutalities of slavery and gave a firsthand account of the experiences of enslaved people. The autobiography was widely read and helped to generate support for the abolitionist movement, both in the United States and abroad.
Douglass's courageous act of publishing his story and naming the whites who had brutalized him contributed greatly to raising awareness and rallying support for the cause of freeing slaves. His powerful narrative roused morale among abolitionists and drew international attention, contributing significantly to the push toward emancipation.