Which statement made by Hiro after learning about a low sodium diet shows he needs further clarification from the nurse?

The statement made by Hiro that indicates a need for further clarification is the belief that "most foods at restaurants are low in sodium." This is a misconception because many restaurant dishes can be quite high in sodium due to various factors such as added salt for flavor, sauces, and marinades, or even the cooking practices used. Therefore, it's essential for him to understand that not all restaurant foods are low in sodium, and he should be aware of specific menu items or ask about sodium content to make informed choices.

In contrast, the other statements reveal some level of understanding about sodium intake. For instance, acknowledging that processed foods often contain higher levels of sodium is important, as they can be significant sources of sodium in the diet. Understanding that fresh vegetables are not high in sodium aligns with dietary knowledge about whole foods. The recognition of needing to avoid canned soups entirely reflects an awareness of the high sodium levels usually found in those products, even if they may not need to be avoided completely in all cases.