Answer:
I'm pretty sure it's Hook; thesis statement; reason; evidence; counterclaim; call to action.
Step-by-step explanation:
You want to hook the audience in, then give your main idea. Then you tell the audience why you're writing this, then give evidence. This is where your research comes in. Counterclaims will show that you're giving all sides of the arguement, and not being specifically biased to your answer, while still explaining why Option A is the better option. After this, the call to action is simply stating what the reader can do personally to fix the problem at hand.
Hope this helps! Persuasive letters are pretty rad, but sometimes they're hard to write out. Good luck on the test!