What was the primary function of Ellis Island?

The primary function of Ellis Island was to serve as a processing center for immigrants arriving in the United States. Established in 1892 and operating until 1954, the island became the most significant gateway for millions of immigrants seeking a new life in America. As they arrived by ship, immigrants underwent medical examinations, legal inspections, and documentation processes to ensure they met the country's entry requirements. This made Ellis Island a crucial point in American history, symbolizing hope and opportunity for those fleeing adversity in their homelands.

The other choices do not accurately represent the main role of Ellis Island. While it has been a site of historical significance that has since been preserved as a museum, its primary and original function focused on immigration processing rather than cultural display, military operations, or serving as a national park.