Argumentation is an argument, and argument is an adjective.

Descriptive words should be descriptive, or descriptive words as adjectives.

Classical English: Classical Chinese.

Classical Chinese refers to articles written in ancient written language. Usually, classical Chinese is old and difficult to understand, because the vocabulary of classical Chinese is ancient and written, which is difficult for modern people to understand. Explanatory writing and argumentative writing are the types of articles, and they are basically two different concepts from classical Chinese.