The stage of plot that shows disagreement or hostility between characters is called

The stage of the plot that shows disagreement or hostility between characters is called the conflict

Explanation:

Conflict is the dramatic struggle between to forces in a story, it normally takes the protagonist and the antagonist, it is directly related to inner and external conflicts from the main character, and it is the fuel for the plot it leads to every aspect of the story and it finished with the resolution, the elements or characters that create conflict on the protagonist are normally opposite to them.