Concept:Land and sea breezes are caused by the uneven heating of land and water, which sets up convection currents in the air.
Explanation:During the day, the land absorbs heat faster than the sea. The air above the land becomes warmer and less dense, so it rises. The cooler, denser air over the sea then flows landward to replace it, forming a sea breeze.
At night, the land loses heat faster than the sea. The air above the sea is now warmer and rises, while the cooler air from the land moves seaward. This produces a land breeze.
Both breezes result from the rising and sinking movement of air caused by temperature differences — this is convection.
Answer:D. convection