The world’s hot deserts, such as the Sahara and the Arabian Desert, are located in the Subtropical High-Pressure Belts (around 30° N/S). In these zones, air that rose at the equator sinks back to the surface. As it sinks, it compresses and warms up (adiabatic heating), which prevents clouds from forming and creates extremely dry conditions. ANSWER: (D) Subtropical high-pressure belt