In 1940, one bull and five cows were brought to the United States in case of a Nazi invasion. These six animals became the basis of which breed in the United States?

The breed that originated from one bull and five cows brought to the United States in 1940 is the White Park. This breed is characterized by its distinct color pattern, primarily white with black or red markings, and has its roots tracing back to ancient English cattle. The significance of the six animals is paramount in establishing the breed within the U.S. during a critical time when there was concern about resource availability due to the threat of invasion.

Other breeds listed in the choices do not have a historical connection to these specific six animals. For example, the Gelbveih breed, known for its beef and milk production, has origins in Germany and was developed separately. The RX3 breed is a more modern composite created for specific traits, and the Galloway breed, which is recognized for its hardiness and high-quality meat, also has a different historical context that does not relate back to the 1940 event. Thus, the connection of the White Park breed to this particular group of cattle provides a unique historical insight into the breed's establishment in the United States.