Final answer:
The correct answer is (d) West.
Step-by-step explanation:
Cold air advection refers to the movement of cold air from one place to another. In the context of a polar high in the Northern Hemisphere, cold air advection occurs due to the rotation of the Earth and the Coriolis force. The Coriolis force leads to a deflection of air movements to the right in the Northern Hemisphere.
Therefore, cold air advection takes place to the south of the center of a Northern Hemisphere polar high as the high-pressure system promotes the outward flow of air toward lower pressure areas, which are typically found to the south of the high-pressure area.
The effects of air advection can be seen in weather patterns and atmospheric circulations, particularly in relation to high and low-pressure systems. Understanding the direction of cold air advection is critical in meteorology as it influences the weather conditions in regions experiencing the advection.