Argumentative essay is an essay about different arguments presented and their justification considered for the essay. You could begin the essay with a quote, statistic or question in order to make the reader interested from the beginning. The next is about providing a background. The strategy could be the backup of what you are going to write. Then, in the next step thesis statement could be presented. Like all other essay types, thesis statement is a significant part of your writing that you squeeze the central idea of your essay into that small part.
In short, the order could be in the following way:
The subject is apple because it is the topic and the verb is have been grown because grown is an action verb and have been is present perfect but I think you do include that as part of a verb.