Read "The Workers of Ellis Island" and look at the photo.

Several desks with Ellis Island employees working with immigrants.

Which idea from the text does this photograph help readers understand?

Immigrants who came to Ellis Island had to wait to be processed.
Immigrants were required to have physical examinations at Ellis Island.
Ellis Island employed approximately five hundred employees at a time.
Numerous organizations offered aid to immigrants at Ellis Island.

The photograph helps readers understand that Ellis Island employed approximately five hundred employees at a time.