Final answer:
Land breezes form at night when cooler, denser air from the land moves towards the ocean, potentially leading to cloud formation over the water. This process reverses during the day with the development of sea breezes.
Step-by-step explanation:
Land breezes form at night when the air over the land cools down more quickly than the air over the water. This occurs because sand and concrete have a lower specific heat capacity compared to water, meaning they do not retain heat as effectively.
At night, the cooler air above the land becomes denser and moves towards the ocean, creating a land breeze. This can cause clouds to form over the ocean as the air rises and cools over the warmer water. The cycle reverses during the day, creating a sea breeze as the warmer air over the land rises and draws in cooler air from above the water.