1. everyday I study at the library, which is down the street, for a few hours
Subordinate.
"Once you finish your work" by itself is not a sentence, therefore it depends on the remaining.
"Life for me ain't been no crystal stair" shows that the mother didn't have an easy life and had to work hard at everything.
Hope this helped! Let me know if there is anything I need to clarify or explain more in depth
An example of scald is to pour boiling water on your hand.
sounds painful as heck