Final answer:
The National Pan-Hellenic Council (NPHC) is the organization that promotes cooperation among fraternities and sororities on campus, especially within historically African-American Greek organizations.
Step-by-step explanation:
The organization that promotes cooperation among fraternities and sororities on campus is the National Pan-Hellenic Council (NPHC). This council is historically composed of nine International Greek lettered fraternities and sororities that serve as a governing body to foster collaborative efforts amongst its member organizations. The NPHC was established to create unity, share resources, and advocate for common interests within Greek life, especially in historically African American, collegiate Greek organizations. Examples of members include Alpha Kappa Alpha, which counts prominent figures such as Kamala Harris and Toni Morrison among its alumni, showcasing the influential network and societal impact of NPHC organizations on and off campus. NPHC's formation was influenced by the desire to provide a collective identity for Black fraternities and sororities at a time when their representation and needs were not being adequately addressed in higher education settings. Today, the council remains active in encouraging academic excellence, community service, and the formation of positive relationships between Greek organizations.