Answer: the claim
Explanation: the claim is where you state you opinion at the very beginning of the essay. The reasoning is where you state your reasons or tell why your opinion is correct. The evidence is where you show your proof to your reasons. For example, if you were going to write an opinion essay on a book, you might want to put a paragraph of text as your evidence in the book. Finally, the conclusion is where you wrap your essay up! You can state your claim, reasons, and evidence in the conclusion.
source: edg 2021