A reader needs to ask, what does the author want to convince you of.
Explanation:
If asking the authors position, you will only find the opinion of the author. While this can also be used to find a claim it isn't always the most effective.
If asking what the issue is in general, you can't find the authors claim from the start.
If asking the reasons, that will help you find the reasoning, not the claim.
say something simple like lunch menu, explain why kids would be happier with certain food, and how it could be healthy and tasty since school foods not that good