Which aspect did the English influence in the development of physical fitness in the USA?

The correct choice highlights the emphasis placed on moral development through sports, a concept that reflects significant English influence during the early development of physical fitness in the United States. The English believed in the integral role of sports and physical activities in shaping character and instilling values such as teamwork, discipline, and perseverance. This perspective shaped various educational and physical fitness programs, focusing not just on physical prowess but also on building moral integrity and citizenship among participants.

This approach laid a foundational mindset in the U.S., promoting the idea that engaging in sports could transfer important life lessons and ethical considerations, which became an integral part of physical education programming across schools and community initiatives. Hence, this moral dimension of sports enshrined by the English has deeply influenced American attitudes towards physical fitness, reinforcing the belief that being physically active is not just about health, but about personal and social responsibility as well.

The other options, while they may have their own historical significance, do not capture the overarching moral and character development theme that was so pivotal during the formative years of physical education in the United States.