The subject, writing, is singular so it needs a singular verb, has.
thank you very much
You're welcome.
There doesn't appear to be anything wrong with the message you have provided. It is a statement asserting that critical writing, such as argumentative essays, typically have a structure. If you have a specific question or if there's something more you would like to discuss about the topic, please let me know and I'll be happy to assist you further.
