Which breed was developed in the 1700s and includes Belgian and Shire in its foundation stock?

The Clydesdale breed was developed in the 1700s in Scotland and has Belgian and Shire horses among its foundation stock. This breed was primarily used as draft horses by farmers and was known for its strength, stamina, and distinctive appearance, characterized by its high feathering on the legs and its generalized bay coloration. The Clydesdale became particularly popular in the late 19th and early 20th century, especially when the Anheuser-Busch Brewing Company began using them as advertising symbols, which further solidified their presence in American culture.

Other options don't share this specific historical background or foundation stock. The Arabian breed has roots tracing back to the Arabian Peninsula, the Canadian horse is a distinct breed that developed in North America, and donkeys are not classified as a breed of horse but as a separate species. Therefore, the clear lineage of the Clydesdale breed, including its development timeline and foundation stock, establishes it as the correct answer.