While she slept, the mother was oblivious to the exploits of her children.
Hope this helps you!
Paragraph blocks are especially useful in problem-and-solution essays because they allow a writer to explain a problem at length and identify components to a solution - C
4) D
The sentence is generally saying that the specific area of land gives you shelter from a storm, which is basically safety. The word 'encloses' itself emanates safety, because basically, 'encloses' means to close over, or to surround. If you don't find that trapping, it would seem more safe than anything else, along with what the sentence itself is trying to say.
As for #5, I can't seem to view the full choices for the question. Could you maybe add another attachment, or list the other two choices there are?