Final answer:
Sandra Cisneros's father believed she should focus on traditional roles, but this belief spurred her to rebel and pursue writing, which influenced her writing style and themes.
Step-by-step explanation:
Sandra Cisneros's father believed that she should marry and have babies and didn't mind if she "majored in something silly like English." This belief affected Cisneros by causing her to rebel against societal expectations and pursue her passion for writing. It also influenced her writing style and themes, as she often writes about her own experiences and challenges traditional literary genres.