A flag mounted on a flag post near the sea coast flutters in the direction of sea. At what time of the day does this happen – at midnight or in the afternoon?

Explanation

To determine when a flag mounted on a flag post near the sea coast flutters in the direction of the sea, we need to understand the concept of land and sea breezes.

### Step-by-Step Solution:

1. **Understanding Land and Sea Breezes**:
- During the day, the land heats up faster than the sea. This causes the air above the land to warm up and rise, creating a low-pressure area. Cooler air from the sea then moves in to replace it, creating a sea breeze that blows from the sea towards the land.
- At night, the situation reverses. The land cools down faster than the sea. The air above the land becomes cooler and denser, creating a high-pressure area. The warmer air over the sea rises, and cooler air from the land moves towards the sea, creating a land breeze that blows from the land towards the sea.

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