Final answer:
The two major conditions affecting atmospheric circulation are Temperature and Pressure. These conditions drive winds and determine weather patterns and climate regions by creating areas of different air pressures.
Step-by-step explanation:
The two major conditions affecting atmospheric circulation are: a) Temperature and Pressure. These conditions play a significant role in how air moves around the Earth's atmosphere, influencing various weather patterns and climate regions. Temperature variations, caused by factors such as elevation, latitude, and Earth-Sun relationships, lead to differences in air pressure. High-pressure areas usually have cooler, denser air that descends and warms up, whereas low-pressure areas are often associated with warmer air that rises and can lead to condensation and precipitation. This interplay of temperature and pressure drives the winds and determines where air will move, thus affecting weather and climate.