Which of the following is NOT one of the five main types of tea?

Herbal tea is not considered one of the five main types of traditional tea because it is not derived from the Camellia sinensis plant, which is the source of all other true teas, including white, green, oolong, and black tea. Instead, herbal teas are typically infusions made from a variety of herbs, spices, flowers, and fruits, making them a broader category outside of the true tea classification.

The five main types of tea, which include white, green, oolong, black, and pu-erh, are all processed in different ways from the same tea leaves. Each type undergoes varying levels of oxidation and processing, which significantly affects their flavor, color, and aromatic properties. This categorization is essential for understanding tea's characteristics and varieties in a traditional context.