Question

which causes a sea breeze?
air temperatures are cooler than normal.
air flows from the poles toward the equator.
air blows over long distances at different speeds.
air above land warms quicker than air over water.

Explanation:

A sea breeze forms due to differential heating of land and water. Land has a lower heat capacity, so air above it warms faster than air over water. Warm land air rises, creating low pressure, and cooler, denser air over the ocean flows inland to replace it, forming the sea breeze. The other options do not describe this specific mechanism.

Answer:

Air above land warms quicker than air over water.