The cool climate of places like Shimla is most linked with which control?

Correct answer: Altitude

Altitude is the height of a place above sea level. As altitude increases, air pressure decreases and the air generally becomes cooler. Shimla is situated high in the Himalayas, so its temperature is lower than that of many places at lower elevations. This is why altitude is one of the important controls of climate. The cool conditions are not mainly explained by population, soil texture, or an ocean current.

Therefore, option A, Altitude, is correct. The question asks for the control most closely connected with Shimla’s cool climate, so we should relate the place’s high elevation to its lower temperature. A useful rule is that temperature usually decreases as height above sea level increases, although other controls can also influence the exact climate.