The authors purpose is the answer that you want.
It seems that the boy uses everyday language in order to describe what he sees and smells. By resorting to this, the reader gets the perspective of a young boy from a poor social class because the imaginary used is based on elements that he might see on daily bases, smells like the cat or somthing roaten are really common in the streets.
Yes,but commitment is not enough alone to help you become successful.Other factors may include hard work, determination,etc.
And I'm pretty sure you can name some more things.