How did mr granger get his revenge on mama?

Mr. Granger sought revenge on Mama by threatening her job as a teacher and using his influence to undermine the family’s efforts to maintain their land. He aimed to assert his power and control over the Logan family, believing that by attacking Mama's livelihood, he could instill fear and compliance. This action reflects the broader themes of racism and economic oppression present in the story. Ultimately, his revenge highlights the struggles faced by the Logans in their fight for dignity and justice.