Which of the following is NOT one of the four main styles of Highland Dance?

The waltz is not considered one of the four main styles of Highland Dance. Highland Dance traditionally comprises specific forms such as the Highland Fling, Sword Dance, Reel, and the Seann Triubhas. These styles each have unique movements and cultural significance linked to Scottish heritage.

The Highland Fling is a lively and vigorous dance performed on one foot, showcasing strength and athleticism. The Sword Dance involves intricate footwork performed over a pair of crossed swords, emphasizing skill and grace. The Reel is characterized by its lively tempo and fast-paced movements, often danced in a group setting.

The waltz, while a popular dance genre, does not belong to the traditional repertoire of Highland dancing, which is rooted in specific folkloric traditions and ceremonies from the Scottish Highlands. Hence, it does not fit within the main styles recognized in this context.