Question

what causes wind?
differences in air pressure
decreases in air temperature
the occurrence of the coriolis effect

Explanation:

Wind is caused by differences in air pressure. Air moves from areas of high - pressure to areas of low - pressure. Decreases in air temperature can affect air density but are not the direct cause of wind. The Coriolis effect influences the direction of wind, not its generation.

Answer:

A. differences in air pressure