Respuesta :
Generally it's always due to temperature difference, but in case of a mountain breeze - it's D)
Mountain breeze is the wind movement that occurs in the mountains and valleys. In the mountain breeze, the valley sides cool more quickly than the air at the night. Thus, option D is correct.
What is a mountain breeze?
A mountain breeze is a flow of the wind in the mountains and valleys at night and daytime. In the daytime, the valley floors are warmer and create a valley breeze by flowing the warm air around the hills and the mountains.
At nighttime, the cooler air settles and flows to the valley making them cooler. The denser cooler air from the hills flows and settles in the valley at night time causing the mountain breeze.
Therefore, the mountain breeze is cooling of the valleys at the night.
Learn more about mountain breeze here:
https://brainly.com/question/11615083
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