Air in motion as it flows from high-pressure to low-pressure areas.

• A. Temperature
• B. Wind
• C. Barometric pressure
• D. Humidity

Answer: (B)

Air in motion from high-pressure to low-pressure areas is wind. This happens because of the pressure gradient force: differences in atmospheric pressure create a push that makes air move from where the pressure is higher to where it’s lower. The larger the pressure difference over a given distance, the stronger the wind.

Temperature describes how hot or cold the air is and can influence wind by creating or altering pressure differences, but it isn’t the motion itself. Barometric pressure is the actual pressure value, not the movement. Humidity is the amount of water vapor in the air and affects properties like density and comfort, but it does not define the act of air moving from high to low pressure.