How did Rosa show character at the sewing factory?

In Chapter Eight (May 1944), owning a camera is illegal, so there’s only a quick shot of Rosa and Erika in front of the sewing factory which reminds Daniel of how Rosa decided to stop eating the soup for lunches at her factory as there was nothing in it - the vegetables were being stolen out before the workers got it. When she and others are fired for refusing the soup, Daniel organizes a group to take their soup over to the sewing factory to show solidarity. Erika also organizes a hunger strike until Rosa and the others are rehired.