Land breeze and sea breeze are two natural phenomena which shows that movement of air occurs due to uneven heating on earth.
Sea breeze: In coastal area, the land warms up faster than the ocean surface. Warm air from the land rises up and creates an area of low pressure. Now the air above the ocean surface is cooler and pressure is higher than that on land. This pressure difference causes the air to move from ocean to sea. This is known as sea breeze.
Land breeze: During night, the land cools down faster than the ocean surface. The warmer air from the ocean rises up and creates an area of low pressure near the surface. This is filled in by cooler air from the land. This gives rises to the land breeze.