Which organization serves as the main governing body for college athletics in the United States?

The NCAA, or the National Collegiate Athletic Association, serves as the main governing body for college athletics in the United States. Founded in 1906, the NCAA oversees the rules and regulations for college sports, ensuring fair play, the health and safety of athletes, and maintaining the integrity of college competitions. It is responsible for organizing the national championships and tournaments in various sports, including the highly popular NCAA Men's and Women's Basketball Tournaments. The NCAA also establishes standards for eligibility, recruitment practices, and scholarships for student-athletes across its member institutions.

The other organizations listed have different roles. The NAIA, or National Association of Intercollegiate Athletics, also governs college athletics but is generally associated with smaller colleges and a smaller number of sports. FIBA, the International Basketball Federation, governs international basketball competitions but does not focus on college athletics within the United States. The USOC, or United States Olympic Committee, oversees Olympic sports in the country but does not directly govern collegiate athletics. Thus, the NCAA is clearly identified as the primary organization regulating college sports in the U.S.