Which air masses converge near the ITCZ?

• A. Polar Maritime and Polar Continental
• B. Tropical Continental and Tropical Maritime
• C. Arctic and Subtropical
• D. Tropical Polar and Equatorial

Answer: (B)

The key idea is that the ITCZ is a belt of warm, rising air formed where tropical air masses converge near the equator. This convergence comes from different tropical air masses meeting as the trade winds from the northern and southern tropics push air toward the equator. The tropical air masses involved are Tropical Maritime, which is warm and moist air formed over tropical oceans, and Tropical Continental, which is hot and dry air formed over tropical land. When these two meet around the equator, they collide, rise, and drive strong convection and heavy rainfall that characterize the ITCZ.

Other options mix air masses from polar or arctic regions or combine tropical types that don’t typically meet at the equator, so they don’t describe the actual convergence environment of the ITCZ.