Which organization is closely affiliated with the Red Cross?

The Red Crescent Society is closely affiliated with the Red Cross because it operates as a complementary organization serving similar humanitarian objectives, particularly in Muslim countries. Both organizations are part of the International Red Cross and Red Crescent Movement, adhering to the same fundamental principles of humanity, impartiality, neutrality, independence, voluntary service, unity, and universality. This affiliation allows them to collaborate on various disaster response and health services, ensuring a unified approach to humanitarian aid across different regions of the world.

In contrast, while the World Health Organization and the United Nations are significant global organizations focused on health and humanitarian efforts, they do not share the same direct affiliation with the Red Cross as the Red Crescent Society does. The International Monetary Fund mainly focuses on economic stability and development, which is not in line with the humanitarian mission of the Red Cross. Thus, the Red Crescent Society stands out as the correct answer due to its direct ties and commitment to similar humanitarian goals.