In this scene Curly is harassing George and lennie. Curly is doing this because he caught George talking to his girlfriend. Curly acts as if he is higher up than everyone and discriminates against everybody like that is true.
In this scene Curly was picking on Lennie and beating him up. Lennie got back up and didn't let Curly discriminate against him and hit him back to show him that he isn't better than everyone. Curly said "come on ya big bastard, get up to your feet. No big son of a bitch is gonna laugh at me. i'll show ya who's yella".
In this scene Lennie sees Crooks' home with a light on and decides to go in. When Lennie first enters, You can tell that crooks is startled by a white person but also says that Lennie is not allowed to be there because Crooks is black. Crooks says, " You got no right to be in my room. This here is my room. Nobodies got any right in here but me".