(a) Sea Breeze: During day time, the temperature of the land rises more rapidly as compared to the sea. It is because the specific heat of land is less than the sea water. The air above the land gets heated, and rises up. It results in the fall of pressure on the land. To make up for this fall in pressure, the cold air from the sea starts blowing towards the land. It gives rise to sea breeze.
(b) Land Breeze: During night, the land loses its heat more rapidly as compared to sea on account of its low specific heat capacity. So warm air above the sea expands and rises up. Thus, the air pressure falls over the sea. To make up for this fall in pressure, the cold air from the land starts blowing towards the sea giving rise to land breeze.