What are the two subzones into which the Rapel area is divided?

The Rapel area, located in the central part of Chile, is known for its significant wine production, particularly in the context of red varieties like Cabernet Sauvignon and Carmenère. It is divided into two main subzones: Cachapoal and Colchagua. Both of these subzones have distinct climate and terroir characteristics that influence the styles and qualities of wines produced there.

Cachapoal, positioned closer to the Andes, typically enjoys a warmer climate with irrigation from melting snow, enabling the cultivation of ripe and bold red wines. Colchagua, on the other hand, is more renowned for its diverse microclimates, which allow for the production of a wide range of high-quality wines, including both reds and whites.

Understanding these subzones is vital for appreciating the variety and quality of wines from the Rapel region, making this the correct choice. The other options presented consist of regions that do not relate to the Rapel area's subdivisions, highlighting the importance of knowing regional divisions in Chile’s winemaking landscape.