In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclones does not originate. What is the reason?

Answer: (b) Inter-Tropical Convergence Zone seldom occurs

The key picks this: the ITCZ rarely moves into these regions, so the trigger for cyclones is missing.

The idea

Tropical cyclones need a moist disturbance that can grow over warm water with limited vertical wind shear. Coriolis deflection helps organise rotation, but cannot create a storm on its own. An ITCZ rarely present south of the equator limits disturbances in these basins. Cool eastern-basin waters and unfavourable shear also help explain their low cyclone activity.

Few suitable tropical disturbances develop → Cool waters can limit evaporation → Wind shear disrupts vertical organisation → Thunderstorms struggle to form a lasting circulation → Tropical cyclone development remains uncommon

Why the others are wrong

(a) Cold currents do keep sea temperatures low here — a strong reason too.

(c) The Coriolis force is not weak at these latitudes.

The trap

Low sea-surface temperature is also a valid reason — both play a part.

Also know

The Benguela Current cools the eastern South Atlantic; the Humboldt Current cools the south-eastern Pacific. The ITCZ is a migrating zone of converging trade winds and rising moist air. Cyclone Catarina in the South Atlantic in 2004 shows that “never” is too strong. A warm sea is necessary in the usual formation setting but is not sufficient by itself.