Final answer:
The worksheet with a pig that knows karate most likely represents the Pop Art movement, which is known for its focus on everyday, popular subjects and recognizable imagery from culture.
Step-by-step explanation:
The artistic style likely represented in a worksheet featuring a pig that knows karate, and described in reference to the Pop Art movement, would be one that elevates everyday, popular subject matter to the level of fine art and often employs recognizable images and icons from culture. Pop Art, which emerged in the 1950s and 1960s, includes works that anyone could easily identify, and it often depicts a range of ubiquitous cultural objects and themes, from comic strips to consumer goods.
Therefore, based on the provided descriptions, while surrealism involves dream-like and fantastical imagery, and minimalism is characterized by its simple, reductive approach focusing on literal presentation without expressive content, Pop Art is most likely the category that a worksheet with a karate-practicing pig would fall under, given its tendency to present familiar images from everyday life and popular culture with a twist of humor or irony.