Question

the quotations are from sadakos character in morning rain. in which quotation is sadakos tone concerned? well, what are your plans for today, oto - san? is it raining? you mean you cant hear that rain? its about time we had some rain, los angeles or no los angeles. well, if its not too much trouble, i think some manju would be nice.

Explanation:

The first quote is a simple inquiry about plans. The second shows surprise about not hearing rain. The third expresses a general thought about rain. The fourth shows a polite request for manju. None of the other quotes convey concern like "Is it raining? You mean you can't hear that rain?" which implies worry about the other person's perception or situation.

Answer:

"Is it raining? You mean you can't hear that rain?"