Boundary between the polar cell and the Ferrel cell in each hemisphere.

• A. Monsoon
• B. Precipitation
• C. Polar Front
• D. Polar Cell

Answer: (C)

The boundary between the Polar cell and the Ferrel cell is known as the Polar Front. This boundary marks where cold polar air meets warmer mid-latitude air, creating a strong horizontal temperature gradient. It typically sits around 60 degrees latitude in each hemisphere, though it shifts with the seasons. The Polar Front is also a region of low pressure and rising air, which drives storm development and carries the jet stream above.

Other options don’t fit because a monsoon is a seasonal wind reversal system, not a boundary between atmospheric circulation cells; precipitation describes what often occurs along the front but isn’t the boundary itself; and the Polar Cell is the atmospheric circulation region itself, not the boundary between it and the Ferrel cell.