Which of the following is not classified as a beef breed?

Brown Swiss is the choice that is not classified as a beef breed because it primarily falls into the category of dairy cattle. This breed is known for its high milk production capabilities and is typically raised for dairy purposes rather than for beef. In contrast, Aberdeen Angus, Hereford, and Charolais are all established beef breeds recognized for their meat quality, growth rates, and overall beef production characteristics. Aberdeen Angus is known for its marbling and tenderness, Hereford is appreciated for its efficient growth and excellent beef quality, while Charolais is recognized for its muscle yield and lighter color. Understanding these classifications helps in recognizing the differences in breeding objectives and the primary purposes for which these breeds are raised.