The correct answer is D) All of the above. Air temperature varies with latitude or distance from the equator, altitude above sea level, and the season of the year. Air temperature decreases as you move away from the equator towards the poles due to the angle of the sun's rays. It also decreases as altitude increases, as there are fewer greenhouse gases to trap heat. Seasonal changes in air temperature are caused by the tilt of the Earth and its position relative to the sun throughout the year. The other options are incorrect because they only address one or two of the factors that influence air temperature, rather than the full range of factors.