The internal structure of a piece of writing is known as organization.
The term refers to how you organize your writing - the way you sequence your paragraphs, how you connect them, the way you transition from one thought to another. There are various ways to organize your work, and you should choose the one which suits you best.
"<em>The other items your parents bequeathed to us,"</em>
and
"<em>until there was no longer any physical trace of you in the house."</em>
are both written in second-person. The narrator is directly addressing someone else, i.e., speaking to them with "you".
They show stages in a thought process.
