One of the most oppressive physical elements about Esperanza's situation that she reacts to is actually the poverty that she and her family faces, and the way that this traps them in their house which Esperanza feels so ashamed of and also gives Esperanza such an intense desire to improve herself and study so that she can escape and buy her own house. You might want to study the vignette entitled "The First Job" for an example of this, as this details the way that Esperanza looks for a job to help pay for her school fees, and is even willing to lie to achieve her aim. Consider the opening paragraph and what it tells us about the realities of poverty that Esperanza faced:
It wasn't as if I didn't want to work. I did. I had even gone to teh social security office the month before to get my social security number. I needed money. The Catholic high school cost a lot, and Papa said nobody went to public school unless you wanted to turn out bad.
Note the way in which Esperanza confesses her need for money and the way that poverty is recognised as being such a physical, concrete reality for her, which has profound implications on the kind of future somebody could expect, as her father's comment about schooling makes clear.