Why does it snow on high hills?

It snows on high hills primarily because the temperature is lower than the freezing point, causing water vapor to freeze and turn into ice. As air ascends over the hills, it undergoes adiabatic cooling, resulting in a decrease in temperature with increasing altitude. If the air temperature drops below the freezing point, the water vapor in the air condenses into tiny ice crystals or snowflakes, leading to snowfall. This process occurs when the air is saturated with moisture, which commonly happens in regions where moist air is forced to rise over mountainous terrain. Additionally, high hills may experience orographic lifting, where air is lifted and cooled as it moves over the elevated terrain. As a result, the combination of cooler temperatures and lifted air masses enhances the likelihood of snowfall on high hills. Therefore, the correct answer is [C] On high hills, the temperature is lower than the freezing point, hence water vapor freezes and turns into ice. Understanding these atmospheric processes is essential for predicting snowfall patterns and studying mountain climates.