Why do you think the government stopped using Ellis Island to receive immigrants?

Please answer in English. Ellis Isand is a small island in New York Harbor where ships brought immigrants before they were let into the United States.Doctors checked the immigrants,and those with certain sicknesses were sent back to their countries. Today Ellis Island is open to public, and many people visit it.
Please answer easy.

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Ellis Island mainly consisted of two types of immigrants: old immigrants and new immigrants. Old immigrants came prior to 1890, mostly from northern and western Europe. New immigrants came after 1890 from the Eastern and Southern parts of Europe. It is said that newer immigrants were not accepted as easily for cultural reasons as well as physical reasons (they were not as white as the old immigrants; white peoples were seen as superior).

Many immigrants were tested for mental problems, physical problems and other illnesses. Those who were wealthy did not have to take these exams.

In order to become a U.S. citizen, immigrants had to pass exams, including reading, writing, and a U.S. history exam. An immigrant did not have to renounce their citizenship from their mother country.

More than 12 million immigrants passed through Ellis Island between 1892 and 1954. Many Americans can trace their immigrant ancestors through Ellis Island.