sie

We are watching the story from the eyes of the little man. So the smile comes towards us: herüber

I guess we use more often 'Brot' without article, since generally 'das Brot' refers to a whole loaf of bread.

It can however also refer to a specific slice of bread, we talked about. The bread I made for her, the bread next to her plate ...

Then again in spoken language you would rather use a local dialect word for the slice of bread, as 'Stulle' (Berlin), Schnitte (Northern Germany),Bemme (Sachsen), Butterschmier (Saarland), Bütterken (Lower Rhein), Knifte (a bit more to the west), Donge (at the border to Rheinland Pfalz)...

Don't kill yourself by trying to memorize all those. I myself just knew about 2 of them :D