Air warms.
Meaning: This means that the temperature of the air is becoming warmer, which is something that happens during the day.
Choice of Words: Air is the mixture of gases that surrounds the Earth. Warms is a verb that means to become hotter or to make something hotter. When you put them together, "Air warms" is a statement that describes the natural process of the air becoming hotter as the Sun rises and heats the Earth.
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