Which of the following associations are correct?

• A. Valley breeze during the day, mountain breeze at night time, a sea breeze blows from the sea to the land
• B. Valley breeze during the night, mountain breeze during the day, sea breeze blows from land to sea
• C. Sea breeze blows from land to sea, valley breeze at night, mountain breeze during the day
• D. Hill breeze during the day, valley breeze at night, sea breeze blows from sea to land

Answer: (A)

Local winds are driven by how terrain and temperature differ over short distances. During the day, valleys heat up quickly, so the air near the valley floor rises and draws in cooler air from the valley bottom up the slopes toward the mountains. That is the valley breeze, moving up the valley. At night, the situation reverses: the mountains cool, and the air on the slopes becomes denser and sinks downslope into the valley, producing the mountain breeze, a downslope flow. Along a coast, the land heats up faster than the sea, causing air over land to rise and cooler air from the sea to move in to replace it, creating a sea breeze that blows from the sea toward the land.

So the described associations—valley breeze during the day, mountain breeze at night, and sea breeze from sea to land—are correct. The other options mix up the timing or the direction of these local winds.