According to the description, what does the weather belong to?

What do you mean by goal? I don't quite understand, so I can only answer like this-

This is a scientific essay (what our teacher said, and some teachers said it was an explanatory essay). Of course, the object of this article is clouds, and what kind of weather is judged by when what kind of clouds appear. In this article, I think the most commonly used explanations are examples and definitions.

PS: What I thought, what the industry and the teacher said, is not the same as what you studied.