Answer:
Due to the specific heat capacity of water.
Step-by-step explanation:
The specific heat capacity of water is about five times more than that of sand. It therefore, takes a much longer time to heat and to cool with respect to sand.
During the day, the land cools faster than the sea. The hot air from the sea rises while the cool air from the sea moves to take its place, giving rise to a sea breeze and regulating the environment temperature.