* Differential Cooling: Land cools down faster than water at night. This is because water has a higher specific heat capacity, meaning it takes more energy to change its temperature.

* Air Pressure Difference: As the land cools, the air above it also cools and becomes denser. This cooler, denser air creates a high-pressure area over the land. Over the sea, the air remains warmer and less dense, creating a low-pressure area.

* Air Flow: Air naturally flows from areas of high pressure to areas of low pressure. Therefore, the cool, dense air over the land flows towards the warmer, less dense air over the sea, creating a land breeze.

So, in summary, land breezes occur because of the temperature difference between land and sea at night, leading to a pressure difference that drives the flow of air from land to sea.