Apart from Social Injustice, what other factors affect racism?

What interactions did berthine have with other chaacters in the story the prisoners by guy de maupassant?

In achebe’s things fall apart, okonkwo finds his son nwoye’s signs of laziness "disquieting" because it reminds him of his wife his father his other son his younger self

Hi brothers and sisters may you tell me the answer of question ?