The topic is the topic you want to describe and discuss, and the central argument is your view and viewpoint on the topic, which is similar to the difference between the central sentence and the narrative event in the narrative. If you plagiarize directly, the argument of the article will be unclear. Answering the reading questions will give you extra points, and the composition will get lower points.

When writing an argumentative essay or doing a related topic, we must determine the central argument, then make a concrete analysis, put forward several sub-arguments, demonstrate the sub-arguments with arguments, and demonstrate the central argument with sub-arguments, focusing on the topic.

We can give an example, an argumentative essay, and the material given is

Life is gorgeous like summer flowers and death is beautiful like autumn leaves;

Ordinary is greater than brilliant, and it hits people's hearts directly.

This is obviously a dialectical relationship of opposites. Let's discuss which is better, ordinary or brilliant. This is the topic. If you write "ordinary is also a kind of brilliance" or "brilliance makes ordinary shine" in your article, such a sentence is the central argument.

Argumentative essays account for a lot of points in the Chinese exam. Reading comprehension and composition are the key points to get marks. Make your article logical and well-structured, which helps to distinguish the central argument from the theme, which is the key to marking or answering argumentative papers.

I hope my answer can help you.