While preparing a paragraph about cooling city roofs, a student records these notes: • Cool roofs reduce heat by reflecting more sunlight from the roof surface. • Green roofs reduce heat through layers of vegetation and soil on the roof. • Both cool roofs and green roofs can lower building and neighborhood temperatures. • Cool roofs often use light-colored or reflective materials. • Green roofs can also absorb rainwater. The student wants to emphasize a contrast between cool roofs and green roofs related to how each roof reduces heat. Which choice best uses the notes?