How do mountain breezes formed?

Mountain breezes form due to temperature differences between the mountain slopes and the valleys. During the night, the air on the mountain slopes cools more quickly than the air in the valleys, causing the denser, cooler air to flow down into the valleys. This downward movement of cool air creates a breeze that can be felt in the lower elevations. As the sun rises, the process can reverse, leading to valley breezes during the day.