Answer:
to explain the feelings of worry experienced by an
immigrant family.
Explanation:
This is the excerpt from Russell Freedman's book "The Immigrant Kids" which tells the story of late 1800s and early 1900s immigrant families arriving in America. Upon arrival, the kids underwent rigorous examinations in order to prevent them from bringing any contagious disease into the country.
However, this excerpt doesn't deal with description of the physical examination; it rather focuses on the fear and constant anxiety triggered by the possibility of a family member being banned from entering the country.
It strongly depicts that family worries never stopped, not even after reaching American soil.
An phrase ends in -ing and functions as a noun is verbals
