Why has Jim decide to run off? Huckleberry Finn

Jim ran away because Miss Watson was going to sell him down South. Huck runs away from his abusive father, and soon runs into an escaped slave. While he lived with Miss Watson, Huck got to know Jim and appreciate him. When Jim told Huck that he had run off, Huck was surprised, but he promised not to tell anyone.

Explanation:

I read the book