Which mechanism drives the formation of desert regions under subtropical high-pressure zones?

💡 Explanation

When air descends in the subtropics as part of the Hadley cell circulation, adiabatic heating occurs because the air compresses and warms as it sinks, reducing relative humidity and inhibiting cloud formation and precipitation. Therefore, deserts form due to adiabatic heating, rather than the other options which require different geographic or atmospheric conditions.

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