The author uses this literary device called Figurative Language to express the feelings experienced; in this passage, the narrator talks about how the its mind and head were with the awful feeling of sadness. The author also talks about the sensation of space in which her mind was enclosed.
All this sentences and comparisons are part of a Figurative language that is used to make the speech more effective, persuasive, and impactful for the reader to feel more deeply the words of the narrator and could live through them. This figure goes beyond the literal meaning of the words and gives the reader more insights.
To me, the crucial part here is "before you begin" - this means that we're being asked for the steps before you write the first letter.
First, it's good to have a topic (1) for your paragraph - or a leading thought if your paragraph is a part of a bigger piece. This will ensure you stay on this topic and not digress.
Second, it's good to have the content ready (2) - so the arguments and the examples you want to give.
Third, it's good to have a structure(3) - this way your paragraph will be easy to read.
If you have those before you even start writing, your paragraph will be well-structured and well-written!
I say it is probably b because law is a list of rules to go by ladder don’t really know but pretty sure it doesn’t mean that I’m assuming it is b because we learned that a long time ago but don’t know if it the same meaning for you