What geographical feature is commonly associated with the tropical regions?

The Torrid Zone is a term used to describe the band of the Earth that lies between the Tropic of Cancer and the Tropic of Capricorn, encompassing the tropical regions. This area is characterized by consistent warm temperatures and significant incoming solar radiation, which contributes to the high levels of biodiversity, rich ecosystems, and tropical climates often observed within. The tropical regions are known for their lush vegetation, including rainforests and diverse fauna, primarily due to the ample rainfall and warmth.

Deserts, glaciers, and savannas, while they can be found in proximity to tropical regions, do not define the tropics like the Torrid Zone does. Deserts generally have arid conditions and significant temperature fluctuations, glaciers represent cold climates that are typically far away from the equatorial areas, and savannas, while they can exist in tropical areas, are classified as grassland ecosystems rather than geographical zones. Thus, the Torrid Zone is the most accurate association with the geographical features of the tropical regions.