The setting of that act is in Mantua, where Romeo is in exile.
The correct option is this: SHE KNEW NOW WHAT MEANT THE DUTIES OF THE HOUSEHOLD, THE HEAVY WORK OF THE KITCHEN.
A topic sentence is a sentence in a paragraph which expresses the major topic or idea that is discussed in that paragraph. A topic sentence can be easily recognized in a paragraph because it is always the opening sentence of the paragraph. The major function of the other sentences in a paragraph is to support the topic sentence.
Are these meant to be titles of something (a book, movie, etc)? If so, then they should either be in quotation marks or in italics.