Read the passage.For years, adults have been telling children, "Go outside. The fresh air will do you good." It turns out that there's a scientific basis for this. But it's not just the air that's so important. It's the sunlight. While sunlight has many benefits for plants, it also has benefits for people.

The passage shifts from the familiar advice about fresh air to emphasize that sunlight is especially important. It ends by saying sunlight benefits both plants and people, so the best question is “What are the benefits of sunlight for people?” Choice A focuses only on plants, and choices C and D focus on fresh air.

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