Where do extratropical cyclones tend to form?

Extratropical cyclones predominantly form in the Ferrel cell, which is situated between the polar cell and the Hadley cell in the mid-latitudes. This area is characterized by a convergence of warm moist air from the subtropics and cold dry air from the polar regions. The interaction of these differing air masses creates the conditions favorable for cyclogenesis, or the development of cyclones.

In contrast, the polar cell experiences stable air properties that do not favor the formation of extratropical cyclones. The Hadley cell, located near the equator, is primarily associated with tropical weather patterns, including tropical cyclones, instead of extratropical ones. The Intertropical Convergence Zone (ITCZ) is also related to tropical weather and is characterized by consistent airmass convergence, leading to the development of thunderstorms rather than extratropical cyclones.

Therefore, the Ferrel cell is the correct answer as it provides the right atmospheric dynamics and temperature gradients conducive to the formation of extratropical cyclones.