wouldn't an analogy be the tree which has several branches, but held together by the trunk?
A good analogy for the word "topic" would be to think of it as a menu in a restaurant. Just like a menu lists various dishes or items that you can choose to explore, a topic is a subject or area of interest that you can delve into. Just as a menu helps you decide what you want to order, a topic helps you determine what you want to learn, discuss, or focus on. You can think of a topic as a broad category, similar to how a menu is organized into different sections like appetizers, entrees, and desserts. Just as you can explore different options on a menu, you can explore various aspects and subtopics within a broader topic.
