In "Gravity", by Judith Ortiz Cofer, the narrator's mother most likely put the guardian angel picture up outside the narrator's room c. to remind the narrator of her Puerto Rican roots.
Elenita starts the narration speaking about her bedroom, which is decorated following her style with her books, and her radio. Her mother decorated the house with pictures of saints and angels in what Elenita calls a primitive Puerto Rican style. Elenita took the picture of the guardian angel out of her room. Her mother placed it outside her door so that she sees it every time she goes in or out of her bedroom, to be reminded of her Puerto Rican roots.
The answer for the first question is A) The dark atmosphere shows that public schools have been victims of destructive weather events. We can observe that the school has been tore apart and its barely standing still, most likely due to the destructive weather event that just took place in the scenario.
For the second question, I believe the answer is C) He compares the colonies to pieces of snake because he believes colonies will be innefective unless they work together. His belief is not only representated by the snake but also by the slogan he chose 'Join or Die' which allows us to understand that unless the colonies unite they are not effective.
Hope this helps!