Final answer:
The full peasant skirt worn at Tyrolean festivals is a Dirndl, consisting of a bodice, blouse, full skirt, and apron, and is part of traditional Austrian folklore costume.
Step-by-step explanation:
The full peasant skirt worn at Tyrolean festivals is known as a Dirndl. This traditional garment is an important part of the regional folklore costume in Austria and surrounding countries. A dirndl consists of a bodice, blouse, full skirt, and apron. While not explicitly stated in the question, the dirndl is the only option listed that is traditionally a skirt or dress used in such folk festivals; Lederhosen refers to traditional short or knee-length leather breeches, Clogs are a type of shoe from a completely different cultural context, and a Kimono is a traditional Japanese garment.