Act I: In the introduction of the movie, all the characters are introduced. We meet the protagonist, Simba, and the antagonist, Scar. In the introduction, Simba is portrayed as an innocent naive lion cub who just wants to enjoy life.
Act II: In this middle section, complications start appearing. Scar murders Mufasa, Simba's dad and the king of Prideland. The audience knows that Scar killed him, but Simba has yet to find out the truth. Simba also starts to mature and realize that it is his destiny to be king.
Act III: The 3rd act is the climax for the movie. In this last resolution/climax section, Simba makes the crucial decision that he is the rightful heir to the throne and he wants to be king of the lions. This is also the act where Simba finally confronts Scar about his father's murder. It turns into a battle between all the lions led by Simba and Scar and his army of hyenas.