Which of the following is NOT a breed of beef cattle?

Leghorn is the correct choice because it is not a breed of beef cattle; rather, it is a breed of poultry, specifically known for its egg-laying capabilities. Leghorns are primarily raised for their production of eggs, particularly in commercial egg-laying operations, and are recognized for their efficiency in this regard.

In contrast, Brahman, Angus, and Hereford are all well-established breeds of beef cattle. Brahman cattle are known for their heat tolerance and adaptability, originating from India. Angus cattle are prized for their high-quality beef and are predominantly black or red in color, while Hereford cattle are recognized for their distinctive white face and are known for their docile temperament as well as the quality of their beef. Each of these breeds has distinct characteristics that make them valuable in beef production, underscoring the importance of recognizing and understanding the differences among livestock breeds in agricultural settings.