What is the general function of the first paragraph of an argumentative essay?

The functions of the first paragraph of an argumentative essay are:

1) Propose the central argument; (2) Lead the topic; for the above two aspects, you must specifically answer the question of proposing the central argument or Specific ways to introduce the topic include famous quotes, anecdotes of famous people, anecdotes and jokes, etc.

You can refer to the following examples of specific answer standard formats to use or adapt them:

①. At the beginning, by writing an example of..., put forward the central argument... (or lead to... topic). ②. At the beginning, put forward the central argument... (or lead to the topic of...) by quoting famous quotes. ③ At the beginning, by quoting anecdotes about famous people (or anecdotes about...) and proposing the central argument... (or a topic that leads to...), it also attracts readers to read on and enhances the interest of the discussion. ?