Clouds reflect sunlight, cooling the earth's surface.

Meaning: This sentence describes how clouds bounce back sunlight, helping to regulate the temperature of the earth's surface.

Choice of Words: Clouds are water vapor that forms in the sky. Reflect means to bounce back or send back. Sunlight is the light from the sun. Cooling means making something cooler. Earth's indicates belonging to the planet Earth. Surface is the outer layer of something.

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