Second, She was telling a story about fide who came from a poor family. and because of her background and her mother story she developed a way of thinking that made her always thinking that the people like fide (the poor) will be always poor and she can’t thinking about anything beside poor even though in reality it was not always like that. 

Third, She was telling a story about her American roommate that thinks the African is nothing about catastrophe. so in her roommate way of thinking, african is still traditional and not as modern as american

Fourth, She describes the problem of single story by talking about her own experiences. For example she she tells us about her experience viewing Mexicans as immigrants. Another example would be she tells us about her experience with her room mate that always thinks Africa is a poor undeveloped country.

Conclusion:
Single story bring a misguided things and developed a weird stigma. and because of that, the way the people thinking is lost and always assuming that the people that stigmatized will always be related to the stigma that exist in society