Final answer:
Frederick Douglass harnessed his education and literacy to publish a critical autobiography that supported his work in the abolitionist movement and the fight for equality.
Step-by-step explanation:
Frederick Douglass used his education to advocate for equality and became an instrumental figure in the abolitionist movement. Douglass's ability to read and write was a cornerstone in his life, allowing him to publish Narrative of the Life of Frederick Douglass, an American Slave, which served as a powerful tool in the fight against slavery. Not only did he use his literacy to forward his cause, but he also held various government positions and established a newspaper to promote equality and support for the Underground Railroad. As for his lectures about the abolitionist cause, these showcased his powerful oratory skills and heightened public awareness about the injustices of slavery. These actions align with Main Idea 2, evidencing Douglass's commitment to helping black people achieve equality.