I agree with Teacher Elina. Paragraphing does help the reader and the writer to put certain thoughts into different paragraphs. It helps the writer organize his or her ideas, and it helps the reader read easier. I am going to put some of my input on the discussion in your title "Agree or disagree: it’s not a good choice to move to a new city because you'll lose your old friends". To me, individually, I wouldn't mind traveling to a foreign land and staying there. Even if it meant losing my old friends. I'm all about what makes me happy, and if that country's landscape or people give me joy and life, I would definitely find a way to live there. As for others, I think it just depends on what one values the most. There are many different reasons as to why people stay in their (somewhat) static society, and why some others move around from place to place. Hopefully, you'll read this comment. I want to recommend this book called "Foreign to Familiar". It's somewhat relevant to this notebook entry discussion, and categorizes all the cultures of the world into two different categories: warm and cold climate cultures. It's a pretty clear-cut way of looking at an ambiguous world of cultures, but I think it's an interesting read.

Paragraphing provides a structure for your writing. The end of a paragraph represents a significant pause in the flow of the writing. This pause helps the reader, indicating that the writing is about to move on to a different stage. Each paragraph should deal with one idea or aspect of an idea, and it should be clear to the reader what this main idea is. A text divided into paragraphs is easier to read.