What are the different types of red wine available and how do they differ from each other?

There are several types of red wine, including Cabernet Sauvignon, Merlot, Pinot Noir, and Zinfandel. These wines differ in taste, body, and aroma due to the grape variety used, the region where they are grown, and the winemaking process. Cabernet Sauvignon is bold and full-bodied, Merlot is softer and fruitier, Pinot Noir is light and delicate, and Zinfandel is rich and spicy.