Which statement about air pressure and wind is correct?

Correct answer: Wind blows due to pressure difference

The direct answer is A: wind blows due to a pressure difference. Air naturally moves from a region of higher air pressure toward a region of lower air pressure, and this moving air is called wind. Step by step: unequal heating of Earth’s surface can make air warm and rise in one place; pressure becomes relatively lower there, while another area may have relatively higher pressure; air then moves between the pressure regions. Other forces can modify wind direction, but the pressure difference is the basic cause asked here. Option A is correct. Option B is wrong because wind and pressure are directly related. Option C is wrong because pressure is not limited to soil; air itself has atmospheric pressure. Option D is wrong because wind is moving air, not still water. Exam cue: high pressure to low pressure is the simple rule for the basic direction of air movement.