The correct answer is 3. You look like Negro Chinese.
Direct characterization means that a character is described directly - the author is explicitly telling us what a particular character is like or looks like. So, the only option that fits this description is 3. The other options are examples of indirect characterization.
I was helping a kid through bullying and there was these girls who where always looking at me when I was talking to him and when we told the teacher about the bullying the girls said I was helping the kid through bullying