I've only read the book a couple of time, but I think that Jim taught Huck that some adults don't leave. Through their journeys, Jim is constantly supportive and caring and loyal to Huck, who in turn becomes so to Jim. Jim shows Huck how true humanity should be, which is ironic because Jim is considered sub-human by all the members of "The Quality."
Huck and Jim argue about English and French. Huck wants to learn French to look educated, while Jim argues that English is more important due to its widespread use in America.
Huck learns from Mrs. Loftus that there is a reward for Jim's capture. Authorities are planning to search Jackson's Island immediately.
That the Widow Douglas had freed him in her will.
Huck doesn't turn Jim in because Jim in Huck's first TRUE friend. Jim is also the only "family" Huck has ever had that cares so much about him and will protect him.
He told Huck that Jim had been sold as a runaway slave!!!
Huck feels free to tease Jim because of the societal norms and racial attitudes of the time that diminished the humanity of African Americans like Jim. Huck, being a product of his environment, does not fully comprehend the impact of his actions on Jim due to his own privilege as a white person.
Jim is initially startled when he sees Huck on the island, as he believes that he has seen a ghost. However, he quickly realizes that Huck is alive and is relieved to be reunited with him. Jim is happy to see Huck safe and well.
Jim is initially angry at Huck for playing a trick on him, but he eventually forgives him after seeing how upset Huck is. Jim understands that Huck didn't mean any harm and values their friendship more than holding a grudge.
No clue
Huck liberated Jim and helped Jim realize who he was!
In 'The Adventures of Huckleberry Finn,' Huck learned that Mrs. Loftus' husband was going to use a gun to capture and turn in his friend, Jim for the reward money. While she was compassionate toward Huck's plight as a runaway child, she had no such compassion for a runaway slave.
Chapter 4: "Jim had a hair-ball as big as your fist, which had been took out of the fourth stomach of an ox. ... He said it knowed everything. What I wanted to know was, what [Pap] was going to do, and was he going to stay?" (text shortened)