How is air pressure related to air circulation?

Air travels from areas of high pressure to areas of low pressure in an attempt to reach a state of equilibrium, which it never does because of the Coriolis effect and uneven heating and humidity.

In general, air pressure is higher over the equator, so it will circulate away from the equator (for example). I believe this answers your question, but if you would like a little more information, here it is: Air pressure is affected by heat and water content. Parts of the world are hotter (nearer the equator, for example), and parts of the world are drier (Sahara), or wetter (oceans).

Air pressure is closely related to air circulation because differences in air pressure create winds and atmospheric circulation patterns. Air moves from areas of high pressure to areas of low pressure, creating wind. These pressure differences are caused by variations in temperature, humidity, and the Earth's rotation. Warm air tends to rise, creating areas of low pressure, while cooler air sinks, creating areas of high pressure. This movement of air, driven by pressure differences, results in various circulation patterns such as trade winds, jet streams, and local breezes.