Help me answer those , I put 2 picture because those are the paragraph that you should read. I will rate you as brainliest if you help
Me


Answer:
The first sentence is the answer
Explanation: When it ask about the main concern of the author, think about how it says that Americans still do not clearly know what is in their bottle of waters compared to the other sentences that don't really talk about what the main concern of the paragraph is talking about.